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  1. No Access

    Article

    Photoluminescence of MBE and MOCVD ZnTe Films on GaAs

    We present low-temperature photoluminescence (PL) spectra of MBE and MOCVD ZnTe layers deposited on (100) GaAs substrates under different growth conditions. Strong bands associated with Zn vacancies are observ...

    B. A. Wilson, Carl E. Bonner, R. D. Feldman, R. F. Austin… in MRS Online Proceedings Library (1987)

  2. No Access

    Article

    Superconductivity near 30 K without copper: the Ba0.6K0.4BiO3 perovskite

    It is well known that the breakthrough of Bednorz and Müller1 in discovering superconductivity in (La, Ba)2CuO4 was inspired in part by their knowledge of the superconducting properties of Ba(Pb, Bi)O3 (ref. 2). ...

    R. J. Cava, B. Batlogg, J. J. Krajewski, R. Farrow, L. W. Rupp Jr, A. E. White… in Nature (1988)

  3. No Access

    Article

    Superconductivity near 70 K in a new family of layered copper oxides

    A new family of high-temperature superconductors is described, with the general formula Pb2Sr2ACu3O8+δ. Although they have the planes of CuO5 square pyramids characteristic of the other copper-oxide superconducto...

    R. J. Cava, B. Batlogg, J. J. Krajewski, L. W. Rupp, L. F. Schneemeyer… in Nature (1988)

  4. No Access

    Article

    Hardness and Elastic Modulus Measurements in CdTe and ZnTe Thin Film and Bulk Samples and ZnTe-CdTe Superlattices

    Hardness and modulus values of bulk and epilayer ZnTe and CdTe samples and of ZnTe-CdTe superlattices are reported. Both hardness and Young’s modulus values increase with increasing ZnTe content in the ZnCdTe ...

    L. J. Farthing, T. P. Weihs, D. W. Kisker… in MRS Online Proceedings Library (1988)

  5. No Access

    Article

    Synthesis of bulk superconducting YBa2Cu4O8 at one atmosphere oxygen pressure

    THE well-known 90-K superconductor Y2Ba2Cu3O7 ('123') is the first (n = 0) member of a homologous series of compounds with the general formula Y2Ba4Cu6+nO14+n. These compounds combine layers of copper–oxygen pyra...

    R. J. Cava, J. J. Krajewski, W. F. Peck Jr, B. Batlogg, L. W. Rupp Jr… in Nature (1989)

  6. No Access

    Article

    Superconductivity at 3.5 K in BaPb0.75Sb0.25O3: why is Tc so low?

    SUPERCONDUCTING BaPb0.75Bi0.25O3, with a transition temperature (Tc ) of 12 K (ref. 1), is now widely viewed as the precursor to the recent appearance of copper oxide superconductors with record high Tc S. The ob...

    R. J. Cava, B. Batlogg, G. P. Espinosa, A. P. Ramirez, J. J. Krajewski… in Nature (1989)

  7. No Access

    Article

    Residence times and coverage by surface intermediates during the Fischer-Tropsch synthesis

    Isotope tracing of alkene readsorption has been used to examine reversibility in the growth of higher hydrocarbons in the Fischer-Tropsch synthesis. Some reversibility is indicated, but the degree is insuffici...

    C. A. Mims, J. J. Krajewski, K. D. Rose, M. T. Melchior in Catalysis Letters (1990)

  8. No Access

    Article

    Superconductivity at 60 K in La2-xSrxCaCu2O6: the simplest double-layer cuprate

    STARTING with the pioneering work of Bednorz and Müller1, many copper-oxide-based superconductors with high transition temperatures (Tc) have been discovered. All contain layers of copper-oxygen squares, pyramids...

    R. J. Cava, B. Batlogg, R. B. van Dover, J. J. Krajewski, J. V. Waszczak… in Nature (1990)

  9. No Access

    Article

    Antiferromagnetism and metallic conductivity in Nb12O29

    AT the heart of the controversy about the microscopic origin of superconductivity in high-transition-temperature copper oxide superconductors is the question of whether or not the antiferromagnetism associated...

    R. J. Cava, B. Batlogg, J. J. Krajewski, P. Gammel, H. F. Poulsen, W. F. Peck Jr… in Nature (1991)

  10. No Access

    Article

    Superconductivity at 23 K in yttrium palladium boride carbide

    COPPER oxide compounds have dominated superconductivity research since 1986 because of their very high transition temperatures (Tcs). In contrast, no new families of high-Tc intermetallic compounds have been disc...

    R. J. Cava, H. Takagi, B. Batlogg, H. W. Zandbergen, J. J. Krajewski… in Nature (1994)

  11. No Access

    Article

    The crystal structure of superconducting LuNi2B2C and the related phase LuNiBC

    SUPERCONDUCTING intermetallic compounds with relatively high transition temperature (Tc) have been found in the systems Ln–Tr–B–C, where Ln is a lanthanide element (Y, Ho–Lu) and Tr a transition metal (Pd or Ni)1...

    T. Siegrist, H. W. Zandbergen, R. J. Cava, J. J. Krajewski, W. F. Peck Jr in Nature (1994)

  12. No Access

    Article

    Superconductivity in the quaternary intermetallic compounds LnNi2B2C

    THE attainment of unprecedentedly high transition temperatures (Tcs) in the copper oxide superconductors illustrates how working with more complex chemical systems allows greater opportunity to balance opposing f...

    R. J. Cava, H. Takagi, H. W. Zandbergen, J. J. Krajewski, W. F. Peck Jr… in Nature (1994)

  13. No Access

    Article

    Electrochemical and high pressure superoxygenation of YCuO2+x and LaCuO2+x delafossites

    Electrochemical and high pressure oxygenation experiments are described which extend the range of intercalated oxygen content beyond that accessible in 1 atm O2 treatments for the triangular planar cuprate delafo...

    R. J. Cava, W. F. Peck Jr., J. J. Krajewski, S-W. Cheong… in Journal of Materials Research (1994)

  14. No Access

    Article

    Superconductivity in lanthanum nickel boro-nitride

    RESEARCH into intermetallic superconductors has recently been reinvigorated by the discovery of superconductivity at 23 K in a Y–Pd–B–C quaternary alloy1 (tying with the long-standing inter-metallic record held b...

    R. J. Cava, H. W. Zandbergen, B. Batlogg, H. Eisaki, H. Takagi, J. J. Krajewski… in Nature (1994)

  15. No Access

    Article

    Neutron Powder Diffraction Refinement of the Nuclear and Magnetic Structures of HoNi2B2C at R.T., 10, 5.1 AND 2.2 K

    The nuclear and magnetic structures of HoNi2B2C have been investigated by neutron powder diffraction at room temperature and at 10, 5.1 and 2.2K. The compound crystallizes with the symmetry of space group 14/mmm ...

    Q. Huang, A. Santoro, T. E. Grigereit, J. W. Lynn… in MRS Online Proceedings Library (1994)

  16. No Access

    Article

    Transparent Conducting Films Grown By Pulsed Laser Deposition

    We have studied the properties of two types of transparent conducting oxides grown by pulsed laser deposition (PLD) on quartz substrates. We have grown films of ITO with resistivity as low as 250 μΩ-cm and wit...

    Julia M. Phillips, R. J. Cava, S. Y. Hou, J. J. Krajewski… in MRS Online Proceedings Library (1994)

  17. No Access

    Chapter and Conference Paper

    Physical Properties of the New Borocarbide Superconductors

    An overview is given on materials and physical properties of the recently discovered 20K-class layered borocarbide intermetallic superconductors, RETM2B2C (RE=rare-earth, TM=Ni, Pd, Pt). Extensive studies on Lu(Y...

    H. Takagi, R. J. Cava, H. Eisaki, S. Uchida… in Advances in Superconductivity VII (1995)

  18. No Access

    Article

    Enhancement of the dielectric constant of Ta2O5through substitution with TiO2

    MICROELECTRONICS research is in large part driven by the demand for smaller components with enhanced performance. For capacitive components, which form the basis of many memory devices, the dielectric constant...

    R. F. Cava, W. F. Peck Jr, J. J. Krajewski in Nature (1995)

  19. No Access

    Article

    Dielectric properties of TiO2–Nb2O5 crystallographic shear structures

    The dielectric constants (K) have been measured near ambient temperature for polycrystalline bulk ceramics of the crystallographic shear compounds TiNb24O62, Ti2Nb10O29, and TiNb2O7. These show enhanced K’s over ...

    R.J. Cava, J. J. Krajewski, W. F. Peck Jr., G. L. Roberts in Journal of Materials Research (1996)

  20. No Access

    Article

    Ln3Cu4P4O2: a New Lanthanide Transition Metal Pnictide Oxide Structure Type

    A new type of lanthanide transition metal pnictide-oxide, Ln3Cu4P4O2 (for Ln = La, Ce, and Nd), is reported. The crystal structure is made from Ln2O2 layers of the Pb2O2 type stacked with layers of Cu2P2 tetrahed...

    R. J. Cava, H. W. Zandbergen, J. J. Krajewski… in MRS Online Proceedings Library (1996)

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