GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • AIP Publishing  (5)
  • 1
    Online Resource
    Online Resource
    Nanostructure of ordering variants in (AlxGa1−x)0.52In0.48P grown on different vicinal GaAs substrates
    AIP Publishing ; 1998
    In:  Applied Physics Letters Vol. 73, No. 12 ( 1998-09-21), p. 1679-1681
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 73, No. 12 ( 1998-09-21), p. 1679-1681
    Abstract: We have investigated the nanostructure of ordered (Al0.5Ga0.5)0.52In0.48P using conventional and high-resolution transmission electron microscopy. As in the case of ternary Ga0.52In0.48P, the morphology of the ordered material depends strongly on the substrate orientation. For a substrate orientation with equal densities of [1̄10] and [11̄0] steps (and, hence, no preference for one particular ordering variant) a nanostructure is found which exhibits similarities to those observed in ternary Ga0.52In0.48P with equivalent substrate orientations. For a substrate orientation which preferentially selects one ordering variant without completely suppressing the formation of the other, we have identified a new type of nanostructure. In this structure, antiphase boundaries between domains containing the preferred variant are frequently formed by thin slices of the suppressed variant. This structural form is directly deduced from high-resolution images.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.122243
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1998
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Microstructural and magnetization studies of sintered and melt-textured Y-Ba-Cu-O
    AIP Publishing ; 1989
    In:  Journal of Applied Physics Vol. 66, No. 12 ( 1989-12-15), p. 5930-5934
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 66, No. 12 ( 1989-12-15), p. 5930-5934
    Abstract: For bulk applications, high-Tc superconductors generally require high critical current density, Jc. This paper reports two methods of producing high-Tc ceramic wires. The first is an extrusion and sintering route where Jc is routinely 600–1000 A cm−2. The second is by melt texturing or directional solidification where we have achieved in excess of 7000 A cm−2 by direct measurement at 77 K in zero field. However, the ease with which wire may be extruded and sintered is attractive and functioning devices have already been manufactured using this route. Fabrication of devices is facilitated by a unique processing route that has resulted in the strongest bulk ceramic yet reported (bend strength & gt;200 MPa). The melt-texturing route and the problems associated with it are examined and compared with the extrusion and sintering route. The processing and the microstructures associated with the directionally solidified YBa2Cu3Ox will be examined in detail as will the resultant superconducting properties, in particular the magnetization.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.343618
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1989
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Integrated high- T c multiloop magnetometer
    AIP Publishing ; 1995
    In:  Applied Physics Letters Vol. 66, No. 11 ( 1995-03-13), p. 1418-1420
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 66, No. 11 ( 1995-03-13), p. 1418-1420
    Abstract: Two integrated, thin-film multiloop magnetometers (fractional turn SQUIDs) have been fabricated using a YBa2Cu3O7−x-SrTiO3-YBa2Cu3O7−x multilayer process. The magnetometers have 16 parallel loops, an outer diameter of 7 mm and effective areas of 1.84 and 1.89 mm2, respectively. The magnetic field noise of the better device, measured in a YBCO tube at 77 K with a bias reversal scheme, was 37 fT Hz−1/2 at 1 Hz and 18 fT Hz−1/2 at 1 kHz.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.113220
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1995
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Low-frequency excess noise in YBa2Cu3O7− x dc superconducting quantum interference devices cooled in static magnetic fields
    AIP Publishing ; 1994
    In:  Applied Physics Letters Vol. 64, No. 25 ( 1994-06-20), p. 3494-3496
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 64, No. 25 ( 1994-06-20), p. 3494-3496
    Abstract: We have investigated the performance of YBa2Cu3O7−x dc superconducting quantum interference devices (SQUIDs) cooled in static magnetic fields, B0, of 0.01–1 mT. For fields less than the earth’s ambient field, about 0.05 mT, the white noise of the devices at 77 K is not materially affected. However, at a frequency f of 1 Hz the spectral density of the 1/f noise, SΦ (1 Hz), at 0.05 mT increases by an order of magnitude over that for zero field. Furthermore, SΦ (1 Hz) scales approximately linearly with B0, suggesting strongly that the noise originates in the motion of vortices in the YBCO film. This increase in noise is likely to be an issue for SQUIDs operated in the earth’s field.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.111251
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Correlation of transport and magnetic critical currents in melt-processed YBa2Cu3O7−δ thick films
    AIP Publishing ; 1994
    In:  Journal of Applied Physics Vol. 76, No. 3 ( 1994-08-01), p. 1720-1725
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 76, No. 3 ( 1994-08-01), p. 1720-1725
    Abstract: Transport critical current measurements have been carried out on melt-processed thick films of YBa2Cu3O7−δ on yttria-stabilized zirconia in fields of up to 8 T both within grains and across grain boundaries. These measurements yield Jc values of ∼3000 A cm−2 at 4.2 K and zero magnetic field and 400 A cm−2 at 77 K and zero magnetic field, taking the entire sample width as the definitive dimension. Optical and scanning electron microscopy reveals that the thick-film grains consist typically of a central ‘‘hub’’ region ∼50 μm in diameter, which is well connected to radial subgrains or ‘‘spokes’’ which extend ∼1 mm to define the complete grain structure. Attempts have been made to correlate the transport measurements of inter- and intra-hub-and-spoke (H-S) critical current with values of this parameter derived previously from magnetization measurements. Analysis of the transport measurements indicates that current flow through H-S grains is constrained to paths along the spokes via the grain hub. Taking the size of the hub as the definitive dimension yields an intra-H-S grain Jc of ∼60 000 A cm−2 at 4.2 K and 0 T, which is in reasonable agreement with the magnetization data. Experiments in which the hub is removed from individual grains confirm that this feature determines critically the Jc of the film.  
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.357687
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...