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  • 1
    Electronic Resource
    Electronic Resource
    Pulsed nuclear magnetic resonance of 59Co in Co3S4 : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4618-4620 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Nuclear magnetic resonance of 59Co in Co3S4, which had been considered to be a simple Pauli paramagnet, has been reinvestigated by a pulsed method. Free-induction decay or spin-echo signals from A and B sites in the spinel structure have been observed. The signal from the magnetic A site shows a temperature-dependent Knight shift, and disappears suddenly at 58 K with decreasing temperature, suggesting the onset of a magnetically ordered state. The hyperfine coupling constant is roughly estimated to be −10 kOe/μB from the K-χ plot. The signal from the nonmagnetic B site, which shows a textbooklike quadrupolar powder pattern, is strong at low temperatures but the effect of the magnetic A site on the B site was not detected. The nuclear spin-lattice relaxation shows the Korringa-type behavior with (T1T)−1=13±2(s K)−1 for 59Co at the A site.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348331
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  • 2
    Electronic Resource
    Electronic Resource
    Pressure effect on magnetic transition temperature and magnetic phase diagram of Mn2−xCoxSb : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4642-4644 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pressure effects on spin-flop transition temperature (Tsf) of Mn2−xCoxSb have been measured in order to study the nature of spin-flop phase transitions. The magnetic phase diagrams for Tsf versus concentration and for Tsf versus pressure have been determined. Tsf increases with increasing applied pressure (dTsf/dp=2.9 K/kbar for x=0.05, dTsf/dp=3.7 K/kbar for x=0.10, dTsf/dp=3.3 K/kbar for x=0.15, and dTsf/dp=2.7 K/kbar for x=0.20). On the other hand, Tsf decreases slowly with x up to (approximately-equal-to)0.05 and increases rapidly under further increasing x at normal atmospheric pressure. On the basis of these results, the microscopic origin of the magnetic anisotropy of Mn2−xCoxSb is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348282
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties of the intermetallic compounds MM'X(M=Cr,Mn, M'=Ru,Rh,Pd, and X=P,As) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4639-4641 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetization, magnetic susceptibility, and crystal structure are investigated on the ternary chromium arsenides CrM'As (M'=Ru,Rh,Pd) and ternary manganese phosphides and arsenides MnM'P(M'=Rh,Pd) and MnM'As(M'=Ru,Pd). MnRhP, MnRuAs, and MnPdAs are ferromagnets with a Curie temperature of Tc=401, 496, and 210 K, respectively. CrRhAs is an antiferromagnet with a Néel temperature of TN=165 K. MnPdP and CrPdAs show spin-glass-like freezing. A magnetic order-order transition is observed for CrRuAs. Susceptibility χ versus temperature curves are well expressed by a formula χ =C'/(T − θ'P)γ for all present compounds. The values of γ are about 3/2 for manganese compounds and CrPdAs, and about 1/2 for CrRuAs and CrRhAs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348281
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  • 4
    Electronic Resource
    Electronic Resource
    Pressure effect on magnetic transition temperatures of Mn3Ga1−xMxC (M=Zn,Sn) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4824-4826 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pressure effects on magnetic transition temperatures of Mn3Ga1−xMxC (M=Zn,Sn) have been measured in order to study the nature of the order-order magnetic phase transitions. The magnetic phase diagrams for the transition temperatures versus concentration and for the transition temperatures versus pressure have been determined. For Mn3Ga1−xZnxC, the intermediate magnetic phase observed in Mn3GaC above 3 kbar appears even at normal atmospheric pressure. On the basis of these results, the relation between the effect of alloying and of pressure on the magnetic transitions of the Mn3Ga1−xMxC (M=Zn,Sn) systems is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344749
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  • 5
    Electronic Resource
    Electronic Resource
    Secondary recrystallization behavior and magnetic properties of grain oriented 2.2% Si-1.5% Mn steel : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6606-6608 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The secondary recrystallization behavior and magnetic properties in ultralow carbon 2.2% Si-1.5% Mn steel containing 0.008% sol.Al was investigated. It was found that the atmosphere of final annealing plays an important role on the secondary recrystallization in this steel. In the case of annealing in N2 containing gas, good magnetic properties equivalent to those of conventional grain-oriented electrical steel were obtained. However, annealing in 100% H2 gas resulted in poor magnetic properties. Annealing in N2 containing gas can be considered as causing a sharp {110}〈001(approximately-greater-than) texture due to the strengthened inhibition resulting from an increase in fine nitrides. These results suggest the possibility of a new simple processing of grain-oriented electrical steel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352525
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  • 6
    Electronic Resource
    Electronic Resource
    Study of the compositional control of the antimonide alloys InGaSb and GaAsSb grown by metalorganic molecular beam epitaxy (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 1161-1167 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: MOMBE (metalorganic molecular beam epitaxy) growth characteristics of Sb containing ternary alloys, InGaSb, and GaAsSb are investigated. In the growth of InGaSb using TEGa (triethylgallium), TMIn (trimethylindium), and Sb4 (elemental antimony), the enhanced desorption of methyl-In molecules at a substrate temperature Tsub of around 500 °C as well as the enhanced desorption of ethyl-Ga molecules at around 515 °C are observed. They are due to the weak bond strength of antimonide compounds. Furthermore, the decrease of Ga solid composition with increasing Sb4 flux and the increase of GaSb partial growth rate with TMIn flow rate are also observed at as high as 500 °C. This is caused by the fact that the site blocking effect of excess Sb atoms exists up to higher Tsub. In the growth of GaAsSb using TEGa, TEAs (triethylarsine), and TESb (triethylstibine), the Sb composition versus TESb/(TEAs+TESb) curve exhibits a bowing characteristic, which is similar to that in the MOVPE (metalorganic vapor phase epitaxy) growth and is different from that in the MBE (molecular beam epitaxy) growth. Mass transport properties of Sb molecules in the MOMBE are considered to be similar to that in the MOVPE. It is found that the Tsub dependence of Sb composition is much weaker than that in the MBE, which is a superior point of MOMBE in the growth of antimonide alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353283
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  • 7
    Electronic Resource
    Electronic Resource
    Thermal expansion and pressure effect on magnetic transition of Mn2−xCoxSb (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4816-4817 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Pressure dependence of the magnetic phase transition temperatures of Mn1.8Co0.2Sb were obtained by measuring temperature variation of initial permeability at various pressure. Both the transition temperature (Tt) from antiferromagnetic (AF) to ferrimagnetic (FM) states and the Curie temperature (Tc) increase with increasing pressure. Temperature variations of the lattice parameters of the sample were also measured by using the powder x-ray diffraction method. The discontinuous change of a and c axes and the changes of the thermal expansion coefficients were observed at Tt and Tc, respectively. It is found that the negative exchange striction below Tc and the sign of volume change at Tt are consistent with the results of pressure dependence of Tc and Tt. On the basis of these results, the relation between the effects of alloying and of pressure on the magnetic transitions of Mn2−xCoxSb system is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344772
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  • 8
    Electronic Resource
    Electronic Resource
    The pressure effect of the Curie temperature in TbAl2 (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5298-5299 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The pressure effect of the ferromagnetic Curie temperature in Tb(Al1−xCox)2, 0≤x≤0.1 was measured by the induction method under hydrostatic pressure. The Curie temperatures of these compounds increased with increasing pressure and the derivative dTc/dp as a function of cobalt concentration did not change so much compared with that of Gd(Al1−xCox)2 [Sato et al., J. Phys. (Paris) Colloq. 49, C8-453 (1988)]. These results are discussed on the basis of the RKKY model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344588
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  • 9
    Electronic Resource
    Electronic Resource
    Numerical experiments for effects of elastic strain energy on decomposition process of binary alloy in a two-dimensional system (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 7683-7689 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: This paper is concerned with phase decomposition of a supersaturated solid solution in a two-dimensional system. We have investigated the behavior of numerical solutions to the Cahn equation including an elastic strain energy term in such a way as to follow the time evolution of composition modulation by computer. It is found that in our numerical experiment the introduction of the elastic strain energy gives no anisotropic effect on the crystallographic direction of the composition modulation, but leads to the decrease in the decomposition rate and quantity at the equilibrium state. Again, it is demonstrated that for a high solute alloy system inside the spinodal region a large circular precipitate is formed at the center of the flat matrix through a very complicated process accompanied with the aggregation and annihilation of particles. The results so obtained are discussed from a numerical point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458154
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  • 10
    Electronic Resource
    Electronic Resource
    Plasma confining potential self-consistently formed by local electron cyclotron resonance in a well-shaped magnetic field (2002)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 9 (2002), S. 1271-1276 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is clearly demonstrated by means of two-and-a-half-dimensional particle simulations that a plasma potential structure is created by local electron cyclotron resonance (ECR) in a plasma flow along a well-shaped magnetic field. The potential structure consists of a negative potential dip and a positive potential hump (plug/barrier potential) around the ECR point at the magnetic-well bottom. In addition, the simulation points out that a spatial deviation of the electron- and ion-density profiles is generated by the ECR, resulting in the formation of the plug/barrier potential to self-consistently compensate it. According to an analysis of the ion energy distribution function parallel to the magnetic field in the upstream region, the height of the plug potential is found to reach the value equivalent to the ion energy corresponding to the high-energy tail component, plugging most of the ions not to pass through the region of the magnetic variation. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1456532
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