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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Semiconductors -- Defects -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (518 pages)
    Edition: 1st ed.
    ISBN: 9780080983646
    Series Statement: Issn Series ; v.Volume 9
    Language: English
    Note: Front Cover -- Defects in Silicon -- Copyright Page -- Table of Contents -- Preface -- Chapter 1. Status and future of silicon crystal growth -- 1. Introduction -- 2. Growth techniques for silicon crystals -- 3. CZ silicon growth -- 4. FZ silicon growth -- 5. Segregation of impurities -- 6. Melt flows -- 7. Impurity striations -- 8. Macroscopic impurity distribution -- 9. Altering the melt flows -- 10. Future aspects -- References -- Chapter 2. Microscopic aspects of oxygen precipitation in silicon -- 1. Introduction -- 2. Current status -- 3. Thermodynamic and kinetic model [7] -- 4. Applications of the preceding model -- Chapter 3. Hydrogen in silicon: state, reactivity and evolution after ion implantation -- 1. Introduction -- 2. Passivation of interface traps -- 3. Passivation of group III acceptors -- 4. High fluence hydrogen implantation -- 5. Conclusions -- References -- Chapter 4. Pairing of acceptors with interstitial donors in silicon and germanium -- 1. Introduction -- 2. Experimental details -- 3.Results and discussion -- 4. Conclusions -- Acknowledgments -- References -- Chapter 5. Hydrogen passivation and thermal reactivation of zinc double acceptors in silicon -- 1. Introduction -- 2. Experimental details -- 3. Zinc-related levels -- 4. Thermal stability -- 5. Hydrogen passivation -- 6. Reactivation -- 7. Summary -- References -- Capter 6. A Hydrogen-Carbo n Relate d Deep Donor in Crystalline n-Si:C -- 1. Introduction -- 2. Sample preparation and characterization -- 3. DLTS measurements -- 4. The dissociation behavior of the hydrogen-carbon related defect -- 5. Discussion -- 6. Conclusion -- Acknowledgment -- References -- Chapter 7. Radiative recombination channels due to hydrogen in crystalline silicon -- 1. Introduction -- 2. Experimental details -- 3 . Experimental data -- 4. Discussion -- Acknowledgments -- References. , Chapter 8. Defects created by hydrogen implantation into silicon -- 1. Introduction -- 2. Experimental details -- 3. Results -- 4. Conclusions -- Acknowledgments -- References -- Chapter 9. Hydrogenation of shallow and deep levels in silicon -- 1. Introduction -- 2. Experiment -- 3 . Results and discussion -- 4. Conclusions -- References -- Chapter 10. Hydrogen-related vibrations in crystalline silicon -- 1. Introduction -- 2. Calculation method -- 3. Calculation results -- 4. Discussion -- Acknowledgments -- References -- Chapter 11. Transition metals in silicon and their gettering behaviour -- 1. Introduction -- 2. The properties of transition metals in silicon -- 3. Gettering of transition metals -- References -- Chapter 12. Donor formation in silicon owing to ion implantation of the rare earth metal erbium -- 1. Introduction -- 2. Sample preparation -- 3 .Capacitance-voltage measurements -- 4. DLTS measurements -- 5. Discussion -- Acknowledgments -- References -- Chapter 13. 1.54 μm photoluminescence of erbium-implanted silicon -- 1. Introduction -- 2. Experimental details -- 3. Conclusions -- References -- Chapter 14. Fast-diffusing defects induced by copper in silicon -- 1. Introduction -- 2. Experimental details -- 3. Chemomechanically polished samples -- 4. Copper-diffused samples -- 5. Discussion -- Acknowledgments -- References -- Chapter 15. Quenched-in, fast-diffusing defects in silicon studied by the perturbed angular correlation method -- 1. Introduction -- 2. Experiment -- 3. Results -- 4. Discussion -- Acknowledgment -- References -- Chapter 16. Recent developments in ion implantation in silicon -- 1. Introduction -- 2. Pre-amorphized and annealed layers -- 3. Ion beam synthesis -- References -- Chapter 17. A study of carbon-implanted silicon for light-emittin g diode fabrication -- 1. Introduction -- 2. Experimental details. , 3. Depth distribution and damage -- 4. Substitutionality and precipitation -- 5. Strain compensation: isovalent solid solutions -- Acknowledgments -- References -- Chapter 18. Role of point defects in the transient diffusion and clustering of implanted boron in silicon -- 1. Interactions between boron atoms and poin tdefects -- 2. Application to transient annealing -- 3. A test of alternative models: spatial vs.concentration dependence -- 4. Conclusions -- References -- Chapter 19. The effect of phosphorus background concentration on the diffusion of tin , arsenic and antimony in silicon -- 1. Introduction -- 2. Experimental details -- 3. Results and discussion -- Acknowledgments -- References -- Chapter 20. Heavy metal contamination during integrated-circuit processing : measurements of contamination level and internal gettering efficiency by surface photovoltage -- 1. Introduction -- 2. Surface photovoltage measurements -- 3.Effect of heavy metals on generation andelectric activity of crystallographic defects -- 4. Effect of heavy metal contamination oncircuit yield -- 5. Efficiency of internal gettering -- 6. Sources of heavy metals -- 7. Conclusion and summary -- References -- Chapter 21. Electronic behaviour of decorated stacking faults in silicon -- 1. Introduction -- 2. Experimental details -- 3. Photoluminescence measurements -- 4. DLTS results -- 5. Discussion -- 6. Conclusions -- Acknowledgments -- References -- Chapter 22. Activation and gettering of intrinsic metallic impurities during rapid thermal processing -- 1. Introduction -- 2. Experimental procedure -- 3. Results and discussion -- 4. Conclusion -- Acknowledgments -- References -- Chapter 23. Gold diffusion in silicon: enhanced substitutional gold formation by rhodium doping -- 1. Introduction -- 2. Experimental details -- 3. Results and interpretation. , 4. Discussion and conclusion -- Acknowledgments -- References -- Chapter 24. Effect of deformation-induced defects on the Fermi level position at recombination centers in n-Si -- 1. Introduction -- 2. Sample preparation -- 3. Experimental details and results -- 4. Discussion -- References -- Chapter 25. Precipitation at grain boundaries in silicon -- 1. Introduction -- 2. Experimental details -- 3. Electrical properties -- 4. TEM observations -- 5. Conclusions -- References -- Chapter 26. Effects of deuterium plasma treatments on the electrical properties of boron-doped silicon -- 1. Introduction -- 2. Experimental procedure -- 3. Results -- 4. Discussion -- 5. Conclusions -- Acknowledgments -- References -- Chapter 27. Modelling of recombination activity and passivation by hydrogen of dislocations in silicon wafers -- 1. Introduction and model -- 2. Experimental details -- 3. Results and discussion -- 4. Conclusions -- Acknowledgments -- References -- Chapter 28. Formation of buried CoSi 2 layers by ion implantation, studied by Mossbauer spectroscopy and Rutherford backscattering spectroscopy -- 1. Introduction -- 2. Experimental details -- 3. Results -- 4. Conclusions -- Acknowledgments -- References -- Chapter 29. Hall effect spectroscopy of thermal donors in silicon films synthesized by oxygen implantation -- 1. Introduction -- 2. Experiment -- 3. Interpretation and discussion -- 4. Conclusion -- Acknowledgments -- References -- Chapter 30. Perturbed angular correlation spectroscopy of acceptor-donor pairs in silicon, germanium and GaAs -- 1. Introduction -- 2. Experimental details -- 3. Results -- Acknowledgments -- References -- Chapter 31. Optical absorption by platinum in crystallin silicon -- 1. Introduction -- 2. Experimental details -- 3. General appearance of the triplet -- 4. Uniaxial stress data -- 5. Discussion -- Acknowledgments. , References -- Chapter 32. Surface characterization of high-dose Sb + implanted rapid thermal annealed monocrystalline silicon -- 1. Introduction -- 2. Experimental techniques -- 3. Results -- 4. Discussion and synopsis -- References -- Chapter 33. Chromium diffusivity in boron-doped silicon: reassessmen to f the activation energy from low tempera ture measurements -- 1. Introduction -- 2. Cr- B pairing reaction -- 3. Experimental details -- 4. Results -- 5. Discussion and conclusion -- Acknowledgment -- References -- Chapter 34. Regrowth of indium-implanted (100), (110 ) and (111) silicon crystals studied with Rutherford backscattering and perturbed angular correlation techniques -- 1. Introduction -- 2. Experimental details -- 3 . Results -- 4. Conclusions -- Acknowledgments -- References -- Chapter 35. Substrate-damage-free laser recrystallization of polycrystalline silicon -- 1. Introduction -- 2. Upper layer -- 3. Substrate damage -- 4. Results -- 5. Conclusions -- Acknowledgments -- References -- Chapter 36. A photoluminescence study of zinc-implanted silicon -- 1. Introduction -- 2. Experimental details -- 3. Results -- 4. Discussion -- 5. Summary -- Acknowledgments -- References -- Chapter 37. Kinetics of silicon amorphization by N + implantation: dose rate and substrate temperature effects -- 1. Introduction -- 2. Experimental details -- 3. Results and discussion -- References -- Chapter 38. Defects and solidification front morphologies in lamp zone-melting-recrystallized silicon-on-insulator films -- 1. Introduction -- 2. Experimental details -- 3. Solidification fronts -- 4. Defects -- 5. Preheating variation -- 6. Discussion -- 7. Conclusions -- Acknowledgments -- References -- Chapter 39. Strain compensation effects on the annealing of Ge +-B +-implanted silicon -- 1. Introduction -- 2. Experimental details -- 3. Results. , 4. Conclusions.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Atmospheric nucleation -- Congresses. ; Aerosols -- Congresses. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (995 pages)
    Edition: 1st ed.
    ISBN: 9780080537825
    Language: English
    Note: Front Cover -- Nucleation and Atmospheric Aerosols 1996 -- Copyright Page -- Contents -- Preface -- Part 1: Nucleation -- Chapter 1. Nucleation of single component supersaturated vapors -- Chapter 2. Ternary nucleation of water- n-nonane - n-butanol: Does the amphiphile work as surfactant in vapor phase nucleation? -- Chapter 3. Density functional theory for binary nucleation -- Chapter 4. Monte Carlo simulations of small H2SO4-H2O clusters -- Chapter 5. Monte Carlo simulation of homogeneous binary nucleation: Toward a theory of sulfuric acid-water system -- Chapter 6. Ion nucleation and growth of sulfuric acid-water aerosol particles: Application of general dynamic equation -- Chapter 7. Experimental evaluation of ion-induced nucleation in nanometer-sized particle formation from SO2/H2O/N2 mixtures by a-ray radiolysis -- Chapter 8. A new technique for ion nucleation using resonance ionization within supersaturated vapors -- Chapter 9. Experimental study of ion-induced nucleation of volatile organic compounds by radon decay -- Chapter 10. Cluster ion mobility spectra of alcohols -- Chapter 11. Joint experiments on homogeneous nucleation. Measurements of nucleation rates in supersaturated n-pentanol vapor -- Chapter 12. Homogeneous nucleation rate measurements in 1-pentanol vapour with helium as a buffer gas -- Chapter 13. The homogeneous nucleation of cesium vapor -- Chapter 14. Recent experiments concerning the role of non-condensable background gases on nucleation -- Chapter 15. Pressure dependence of nucleation rates in binary systems -- Chapter 16. Isomorphisms between nucleation theory and microemulsion theory -- Chapter 17. Statistical-mechanical basis for the 1/S correction to classical homogeneous nucleation theory -- Chapter 18. Scaling properties of the critical nucleus in classical and density functional nucleation theories. , Chapter 19. Thermodynamics and phenomenological nucleation theories -- Chapter 20. A virial/Fisher model of cluster populations at the critical point -- Chapter 21. The binary nucleation of n-octane and iso-octane -- Chapter 22. Homogeneous nucleation rates in binary vapor system Water-n-butanol from pex-tube experiments -- Chapter 23. Transient behavior and time lags in binary nucleation -- Chapter 24. Thermocynamic and kinetic consistency of calculated binary nucleation rates -- Chapter 25. Vapor nucleation rate surface topology of the soluble and partially soluble binary mixtures -- Chapter 26. Homogeneous nucleation of silicon: Effects of the properties and kinetics of small structured clusters -- Chapter 27. Binary contribution to nucleation rates -- Chapter 28. Nucleation in ethanol vapor: The effect of dimer formation -- Chapter 29. A model for the interpretation of cluster formation in chemical reactions -- Chapter 30. Time-dependent nucleation in very rapid non-isothermal processes -- Chapter 31. New Microscopic Approach to Condensation Problems -- Chapter 32. Determination of free energy and rate of nucleation of N2O4 clusters (Nucleation of rocket fuel in space) -- Chapter 33. Heterogeneous embryo radius on spherical substrate -- Chapter 34.Nucleation mechanism in vapour phase epitaxial growth of binary, ternary and quaternary semiconductors -- Chapter 35. Multicomponent nucleation on aerosol particles-containing both soluble and insoluble substances -- Chapter 36. Monte Carlo simulation on the water microcluster in the detailed balance -- Chapter 37. Nucleation kinetics in gaseous system with big gradients of thermodynamic variables -- Chapter 38. Photonucleation kinetics -- Chapter 39. Energy transfer and fluctuations of nucleation rate -- Chapter 40. Structure of a metallic microcluster of single and binary-compounds. , Chapter 41. Binary photoinduced nucleation: Transition from the molecular condensation nuclei mechanism to the kinetically controlled binary collision stage (and then to the thermodynamically described behaviour) -- Chapter 42. Nucleation of marine aerosols: A laboratory observation -- Chapter 43. A time-dependent solution for the cluster concentrations in homogeneous nucleation -- Chapter 44. Theory of multicomponent nucleation: Effective medium approach -- Chapter 45. Aerosol formation induced by W(CO) 6 photolysis in air.Experiment and numerical modelling -- Chapter 46. The flow diffusion nucleation chamber: A quantitative instrument for nucleation research -- Chapter 47. How does the wall of the diffusion cloud chamber affect performance -- Chapter 48. A critical line limitation of embryos Laplass's pressure -- Chapter 49. Nucleation in the presence of air ions and aerosol particles -- Chapter 50. Molecular theory of ultramicro clusters and nucleation. I. The surface free energy -- Chapter 51. Nucleation from atmospheric fluctuations -- Chapter 52. A new semiphenomenological model for surface tension size dependence -- Chapter 53. Nucleation controlled growth of aerosol particles -- Chapter 54. Nucleation and condensation rate measurement by condensation wave -- Chapter 55. Phase transition of condensate formed by heterogeneous nucleation of condensable vapors onto a cold substrate -- Chapter 56. Kinetic theory of condensation on identical heterogeneous centers -- Chapter 57. Condensation on the spectrum of heterogeneous centers with different activities -- Chapter 58. Modeling of vapour-liquid transient nucleation in binary system -- Chapter 59. Motion pictures of nucleation and growth of solid phases in supercooled molecular clusters -- Chapter 60. Computer simulation of prenucleation cluster using percolation theory. , Chapter 61. Biologial application of nucleation theories - I -- Nucleation and growth of lung cancer -- Chapter 62. Effect of supersaturation, temperature and total pressure on the homogeneous nucleation of n-pentanol -- Chapter 63. Effect of dimensionality on the temperature dependence of rate of nucleation -- Chapter 64. Number of clusters formed in nucleation-growth processes -- Part II: Stratospheric Aerosols and Ice Nucleation -- Chapter 65. The role of particulate matter in ozone photochemistry (stratosphere and troposphere) -- Chapter 66. Ice nucleation…A review -- Chapter 67. Formation mechanisms of polar stratospheric clouds -- Chapter 68. Aerosol production caused by civil air traffic: An overview of near-field interactions -- Chapter 69. Particle formation in jet aircraft exhausts and contrails for different sulfur containing fuels -- Chapter 70. Latitudinal and temporal variations of the climatic response to enhanced stratospheric aerosol concentrations from the Mt.Pinatubo eruption -- Chapter 71. Dynamics of development and relaxation of stratospheric aerosol layer after the Mt.Pinatubo eruption based on the observations at Siberian Lidar Station -- Chapter 72. Kinetics of homogeneous nucleation in large molecular clusters -- Chapter 73. Laboratory studies of sulfate aerosols at low temperature -- Chapter 74. Crystallization kinetics of nitric acid dihydrate aerosols: Implications for polar stratospheric clouds -- Chapter 75. Freezing of binary and ternary solutions of H2SO4,HNO3 and H2O under stratospheric conditions: Nucleation statistics and experiments -- Chapter 76. Influence of adsorbed atomic and molecular ions electric field on ice phase formation in clouds -- Chapter 77. Directed ice nuclei modification by variation of aerosol particles composition. , Chapter 78. A study on the climate change of ice nuclei concentration in Beijing of 1963 and 1995 -- Chapter 79. On vertical change of concentration of aerosol particles and ice nuclei in atmosphere -- Chapter 80. Study of effect of electrical charges and electrical fields on ice-forming activity of aerosols -- Chapter 81. A possible impact of stratospheric aerosols over surface mean temperature trends in Cuba -- Chapter 82. A numerical simulation of a contrail -- Chapter 83. Monte Carlo studies of water/ice adsorbed on model AgI: Effects of lattice shift -- Chapter 84. Ice nucleation on sulfuric acid particles -- Chapter 85. Laboratory studies on evaporation ice nuclei -- Chapter 86. Nucleation characteristics of polycrystalline ice crystals -- Chapter 87. 3D-simulation of the formation and the development of stratospheric aerosol -- Chapter 88. Vertical diffusion simulation of Be 7 at midlatitudes -- Chapter 89. Isolating and identifing atmospheric ice-nucleating aerosols: A new technique -- Chapter 90. Intercomparing results of ice nuclei concentration measurements carried out simultaneously using cloud chamber and filter method -- Chapter 91. Does electrostatic charge at cloud tops affect rates of nucleation and sedimentation of ice? -- Chapter 92. Size-dependent stratospheric droplet composition in rapid temperature fluctuations -- Chapter 93. Numerical simulation of freezing of strong electrolyte solution -- Part III: Tropospheric Aerosols -- Chapter 94. Fractal aggregates in the atmosphere -- Chapter 95. Phase transitions in Finnish sauna -- Chapter 96. Water nucleation on aerosol particles containing both soluble and insoluble substances -- Chapter 97. Transport of radioactive materials in convective clouds -- Chapter 98. On the physical, chemical, and toxic properties of highly dispersed atmospheric aerosols. , Chapter 99. Relationship between light scattering coefficient and chemical composition of atmospheric aerosol particles in Hungary.
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  • 3
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Aerosols. ; Microphysics. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (201 pages)
    Edition: 1st ed.
    ISBN: 9783642818059
    Series Statement: Topics in Current Physics Series ; v.29
    Language: English
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  • 4
    Keywords: Forschungsbericht ; Künstliche Intelligenz ; Verkehrssicherheit ; Deep learning ; Verkehrsknotenpunkt ; Verkehrsunfall ; Prognose ; Neuronales Netz ; Merkmalsraum
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (110 Seiten, 6,63 MB) , Illustrationen, Diagramme, Karten
    Edition: Version: 1.0
    Language: German
    Note: Förderkennzeichen BMVD 19F2082A+B , Verbundnummer 01186291 , Literaturverzeichnis: Seite 108-110 , Laufzeit 01.06.2019 bis 30.11.2021 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 5
    Keywords: Forschungsbericht ; Verkehrsplanung ; Regionale Mobilität ; Verkehrsnachfrage ; Verkehrsbedienung ; Management
    Type of Medium: Online Resource
    Pages: Online-Ressource (265 S., 7,69 MB) , Ill., graph. Darst., Kt.
    Language: German
    Note: Förderkennzeichen BMBF 19P1072 A-L - 19P1072 N-Q. - Verbund-Nr. 01020784 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Auch als gedr. Ausg. vorh , Systemvoraussetzungen: Acrobat reader.
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  • 6
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    PANGAEA
    In:  Supplement to: Xie, Hongjie; Ackley, Stephen F; Yi, D; Zwally, H Jay; Wagner, P; Weissling, Blake P; Lewis, M; Ye, K (2011): Sea-ice thickness distribution of the Bellingshausen Sea from surface measurements and ICESat altimetry. Deep Sea Research Part II: Topical Studies in Oceanography, 58(9-10), 1039-1051, https://doi.org/10.1016/j.dsr2.2010.10.038
    Publication Date: 2023-12-13
    Description: Although sea-ice extent in the Bellingshausen-Amundsen (BA) seas sector of the Antarctic has shown significant decline over several decades, there is not enough data to draw any conclusion on sea-ice thickness and its change for the BA sector, or for the entire Southern Ocean. This paper presents our results of snow and ice thickness distributions from the SIMBA 2007 experiment in the Bellingshausen Sea, using four different methods (ASPeCt ship observations, downward-looking camera imaging, ship-based electromagnetic induction (EM) sounding, and in situ measurements using ice drills). A snow freeboard and ice thickness model generated from in situ measurements was then applied to contemporaneous ICESat (satellite laser altimetry) measured freeboard to derive ice thickness at the ICESat footprint scale. Errors from in situ measurements and from ICESat freeboard estimations were incorporated into the model, so a thorough evaluation of the model and uncertainty of the ice thickness estimation from ICESat are possible. Our results indicate that ICESat derived snow freeboard and ice thickness distributions (asymmetrical unimodal tailing to right) for first-year ice (0.29 ± 0.14 m for mean snow freeboard and 1.06 ± 0.40 m for mean ice thickness), multi-year ice (0.48 ± 0.26 and 1.59 ± 0.75 m, respectively), and all ice together (0.42 ± 0.24 and 1.38 ± 0.70 m, respectively) for the study area seem reasonable compared with those values from the in situ measurements, ASPeCt observations, and EM measurements. The EM measurements can act as an appropriate supplement for ASPeCt observations taken hourly from the ship's bridge and provide reasonable ice and snow distributions under homogeneous ice conditions. Our proposed approaches: (1) of using empirical equations relating snow freeboard to ice thickness based on in situ measurements and (2) of using isostatic equations that replace snow depth with snow freeboard (or empirical equations that convert freeboard to snow depth), are efficient and important ways to derive ice thickness from ICESat altimetry at the footprint scale for Antarctic sea ice. Spatial and temporal snow and ice thickness from satellite altimetry for the BA sector and for the entire Southern Ocean is therefore possible.
    Keywords: Bellingshausen Sea; Event label; Freeboard; ICE; Ice station; International Polar Year (2007-2008); IPY; Latitude of event; Longitude of event; Nathaniel B. Palmer; NBP0709; Number of measurements; Sea ice thickness; SIMBA; SIMBA_Brussels; SIMBA_Fabra; SIMBA_Station-1; SIMBA_Station-2; SIMBA_Station-3; Snow thickness
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 3370-3384 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: An electrically conductive spherical sample located in an electromagnetic field excited by rf (radio frequency) current in a system of coaxial coils is treated theoretically. Maxwell's equations are solved exactly and all integrals in the formulas for the fields are evaluated analytically for the case where the sphere is on the axis and the coil system is modeled by a stack of filamentary circular loops. Formulas are also derived for electromagnetic force exerted on the sphere, excess impedance in the coil system due to the presence of the sphere, and power absorbed by the sphere. All integrals in those formulas have been evaluated analytically. Force measurements are presented and they are in excellent agreement with the new theory. A low-power electromagnetic levitator that is accurately described by the theory has been demonstrated and is discussed. Experimental measurements of excess impedance are presented and compared with theory, and those results are used to demonstrate an accurate noncontact method for determining electrical conductivity. Theoretical formulas for power absorption are evaluated numerically and their usefulness in both rf heating and in making noncontact measurements of a number of thermophysical properties of materials is discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 103 (1995), S. 4333-4345 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In two preceding papers the molecular content of binary ethanol-hexanol and water-ethanol nuclei, respectively, was determined from nucleation rate measurements. While nucleation of ethanol-hexanol mixtures behaved nearly ideal, a strong mutual nucleation enhancement for water-ethanol was observed. Here we extend the investigations to include the longer chain alcohols, that is water −CiH2i+1OH systems with i=2 to 6. Using the nucleation pulse technique developed in the past few years nucleation rates in the range 105〈J/cm−3 s−1〈109 are measured. Ranging from pure water to pure alcohol the water and alcohol activities, a1 and a2, respectively, are varied for each system with about ten intermediate compositions at constant temperature T=260 K. Aside from a remarkably similar behavior of the various alcohols, one observes that with increasing alcohol chain length the mutual nucleation enhancement decreases. Since all water-alcohol systems behave qualitatively similar, we confine ourselves to present the full experimental nucleation rate surface J(a1,a2) for one system, water-n-pentanol, as an example. From the nucleation rate surface for each system the onset activities corresponding to a reference nucleation rate of J0=107 cm−3 s−1 are determined. From the slopes of the nucleation rate surfaces one obtains the individual numbers of molecules in the critical cluster ni* because ∂ ln J/∂ ln ai≈ni*. As noted previously, determining the molecular content this way does not involve any particular theoretical model, nor does it depend on the structure of the critical cluster. Accordingly, the average composition of the critical clusters can be obtained. An alcohol enrichment of the nuclei at low alcohol activity fraction is found for all alcohols examined, the degree diminishing with increasing alcohol chain length. The appearance of a macroscopic miscibility gap for the higher alcohols is not reflected in any qualitative change of the composition of the microscopic nuclei. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 346-353 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermal donors generated in Czochralski-Si by heat treatment at around 450 °C can be preferentially aligned by applying a large uniaxial stress during their formation process. This alignment is clearly observed by a polarization of the optical transitions of the thermal donors and a corresponding effect for the paramagnetic NL8 centers. Thus a strong correlation between thermal donors and NL8 is again demonstrated, as well as the extended defectlike nature of such defects. The g3 value of the g tensor and the 2p0 dipole oscillator are found to be oriented preferentially perpendicular to the stress direction, a result which seems to disagree with some of the presently discussed thermal donor models.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 1429-1435 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We investigate the thickness dependent properties of manganite films characterized by colossal negative magnetoresistance. Ultrathin, wedge-type films (0–120 Å) of La0.7Ba0.3MnO3 were deposited by laser ablation onto SrTiO3 and LaAlO3 substrates. The films were patterned into strips of different thickness and magneto-transport measurements were performed at temperatures between 5 and 290 K and in magnetic fields up to 5 T. Atomic force- and transmission electron microscopy were done to correlate the microstructure with the transport data. The resistivity of the films increases slightly with decreasing thickness due to substrate-induced compressive strain. Below 50 Å, the resistivity rises abruptly indicating a crossover to discontinuous and finally island-like film growth as confirmed by the microstructural techniques. At thicknesses slightly above the threshold for percolative conduction ((approximate)30 Å), an enhanced low-field magnetoresistance was observed as a signature of spin-dependent tunneling. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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