ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • American Institute of Physics (AIP)  (5)
  • American Association for the Advancement of Science (AAAS)  (1)
  • 1985-1989  (6)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Superconducting thin films of Bi-Sr-Ca-Cu-O obtained by laser ablation processing (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 321-323 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of Bi-Sr-Ca-Cu-O, deposited on (100) cubic zirconia by laser ablation from a bulk superconducting target of nominal composition BiSrCaCu2 Ox , have been investigated by dc resistance and magnetically modulated microwave absorption measurements. The latter technique reveals important features regarding the phase purity of superconducting samples that are masked in the dc resistance measurements. The superconducting behavior of the films, as a function of the substrate temperature during deposition and the post-deposition annealing conditions, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100597
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Magnetic properties of thin-film Ag+iron-oxide granular metals (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4261-4263 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic properties of iron-oxide particulates dispersed in silver (prepared by rf diode sputtering silver and iron oxide over a wide composition range) have been investigated using the Mössbauer effect, electron microscopy, and vibrating sample magnetometry. The sputtered films are nanocrystalline mixtures of immiscible particles of the two constituents (even when only a very small amount of silver is present). At room temperature, the Mössbauer effect data show that for most compositions (even those with low silver content) the majority of the film is superparamagnetic, with the fraction of material in the superparamagnetic state increasing with increasing Ag content. Consistent with these results, very narrow hysteresis loops were observed. On decreasing the temperature to near 100 K, the fraction of material in the superparamagnetic state decreased and the magnetically ordered component increased. Electron diffraction patterns clearly showed the presence of polycrystalline Ag and Fe3 O4 in the films, but composition analysis (0.03 μm resolution) was unable to separate these regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341146
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Field ion microscopy of the high Tc superconductor Ba2YCu3O7−x (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4232-4232 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Field ion microscopy (FIM) observations (using either hydrogen or neon gas) were performed on both the high Tc superconducting oxide Ba2YCu3O7−x (0〈x〈0.5) and the related nonsuperconducting oxide Ba2YCu3O6. For the superconducting material, ac magnetic susceptibility measurements determined a transition temperature of 92 K. At 30 K strong preferential images of atomic or molecular layers were observed for Ba2YCu3O7−x perpendicular to the long c axis, but not for Ba2YCu3O6. The preferential field evaporation or field ionization responsible for the layered images (possessing a spacing of approximately 12 A(ring) which is equivalent to the c-axis lattice parameter) in the superconducting oxide below its transition temperature is interpreted as possible evidence for the existence of relatively highly conducting atomic layers in the unit cell of this material at low temperatures. Computer simulations of FIM images expected under various assumptions of preferential imaging are most consistent with the layered images being due to the copper-oxygen end planes (those located between the planes of Ba atoms). FIM observations of Ba2YCu3O7−x performed above the superconducting transition temperature (at 100 K) showed primarily a highly intense disordered image similar to that obtained for the structurally related nonsuperconducting oxide Ba2YCu3O6 at low temperatures, and faintly discernible parallel rows of atoms. Both twins and grain boundaries in Ba2YCu3O7−x have been observed in the FIM at low temperatures; and no special images related to the superconducting state have been found to be associated with these structural features. To date, consistent observations have been performed on approximately 100 specimens, thereby assuring that the present observations are not artifacts, but representative of the bulk material. Similar FIM observations have also been obtained for the related high Tc superconductor Ba2YbCu3O7−x.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340241
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Magnetic behavior of both superconducting thin films and their deposition targets (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4199-4201 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The superconducting properties of the bulk oxides La1.85Sr0.15CuO4−x and Ba2YCu3O7−y were investigated through their magnetic behavior by vibrating-sample magnetometry and complex ac susceptibility, and by dc resistivity and microwave response. These oxides were then used as targets in the preparation of thin films using a laser-ablation technique. The superconducting properties of the films were established through their microwave response. The M-H loops at low temperatures clearly establish the type-II behavior of the Ba-Y-Cu-O materials. The real part of the ac susceptibility showed the superconducting transition. Simultaneously, the imaginary part of the ac susceptibility showed the existence of nonsuperconducting portions in the samples which have a low enough resistivity to carry a significant amount of current. The novel method of microwave response was used to detect the superconductivity for both the bulk oxides and the thin films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340223
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Constricted diamagnetic hysteresis loops observed for the high Tc superconductors (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4179-4181 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic hysteresis loops, ac susceptibility, and resistivity measurements have been made on a Ba2 YCu3 O7−x-type high- Tc superconductor. The shape of the hysteresis loops well below Tc are reminiscent of constricted hysteresis loops observed in certain ferromagnetic materials which are usually associated with magnetic aftereffects. Similar dynamic effects, with a time constant on the order of 10 s at 40 K, are shown to be present in the superconducting material. This dynamic magnetic viscosity effect is in addition to the flux creep observed for longer time periods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341127
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    facet.materialart.
    Unknown
    Possible Evidence for Superconducting Layers in Single Crystal YBa2Cu3O7-x by Field Ion Microscopy (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-01-08
    Description: The high-transition-temperature superconducting ceramic material YBa(2)Cu(3)O(7-x) (0〈 x 〈 0.5) has been examined by field ion microscopy. Specimens from nominally superconducting and nonsuperconducting samples(determined by magnetic susceptibility measurements) were studied by field ion microscopy and significant differences were found. Preferential imaging of atomic or molecular layers, due to preferential field evaporation, field ionization, or both, was found in the superconducting phase below the transition temperature and is interpreted as possible evidence for the occurrence of relatively highly conducting layers in the YBa(2)Cu(3)O(7-x) unit cell perpendicular to the orthorhombic c-axis. Similar results were obtained for YbBa(2)Cu(3)(7-x).〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Melmed, A J -- Shull, R D -- Chiang, C K -- Fowler, H A -- New York, N.Y. -- Science. 1988 Jan 8;239(4836):176-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17732978" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...