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    Article

    Specific heat of YFe3(BO3)4, Y0.5Gd0.5Fe3(BO3)4, and GdFe3(BO3)4

    The specific heat was measured in the range 0.4–300 K in YFe3(BO3)4, Y0.5Gd0.5Fe3(BO3)4, and GdFe3(BO3)4 single crystals. Sharp anomalies were found at temperatures of first-order structural, second-order antifer...

    A. N. Vasiliev, E. A. Popova in Journal of Experimental and Theoretical Ph… (2006)

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    Article

    Long-range magnetic order in quasi-one-dimensional NaCrSi2O6 and NaCrGe2O6 metal oxides

    Formation of a long-range magnetic order is observed at low temperatures in NaCrSi2O6 and NaCrGe2O6 quasi-one-dimensional metal oxide compounds with a pyroxene structure. The first of these compounds, NaCrSi2O6, ...

    A. N. Vasil’ev, O. L. Ignatchik in Journal of Experimental and Theoretical Ph… (2003)

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    Article

    Submillimeter-wave ESR measurements of Ca1−xCuO2 (x = 0.164) with edge-sharing CuO2 chains

    Quasi-one-dimensional (1-D) cupric oxide Ca1−xCuO2 (x = 0.164) is the system with 25–40% hole-doped edge-sharing CuO2 chains. However, the holes are almost localized in Ca1−xCuO2 and its magnetic susceptibility w...

    A. Ueda, H. Ohta, S. Okubo, Z. Hiroi, M. Okumura, M. Takano in Applied Magnetic Resonance (2000)

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    Chapter and Conference Paper

    Novel Transition Metal Oxides Prepared at High Pressure and Their Electronic Properties

    We have searched for transition metal oxides exhibiting interesting electronic properties by using various preparative techniques. High pressure synthesis at 3GPa and 1200K, typically, has yielded, for example...

    M. Takano, Z. Hiroi, M. Azuma, S. Kawasaki in Physics and Chemistry of Transition Metal … (1999)

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    Chapter and Conference Paper

    Dramatically Improved Flux Pinning Properties of Heavily Pb-Doped Bi2212 Single Crystals and Ag Composite Tapes

    Magnetization properties of Bi(Pb)2212 single crystals were found to be systematically improved by increasing Pb-do** and oxygen do** levels. At the liquid nitrogen temperature, the heavily Pb- doped and m...

    J. Shimoyama, Y. Nakamama, T. Motohashi, T. Fujita in Advances in Superconductivity X (1998)

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    Article

    Appearance of magnetic long range order in the spin ladder compound LaCuO2.5

    We report here the two current topics in the ladder compounds.

    J. Akimitsu, H. Okajima, A. Yamashita, K. Ishii, T. Yokoo in Hyperfine Interactions (1997)

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    Article

    A new approach to the design of high-Tc superconductors: Metallised interlayers

    We show from muon spin relaxation (μSR) studies on mercury HTS superconductors that a 50-fold increase in irreversibility field obtained by partial substitution of Re for Hg is due to metallisation of the Hg/R...

    J. L. Tallon, C. Bernhard, Ch. Niedermayer in Journal of Low Temperature Physics (1996)

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    Chapter and Conference Paper

    Chemical Stabilization and Flux Pinning in Hg-Based Superconductors

    Effect of chemical stabilization by substitution of a small amount (0.1~0.25) of rhenium (Re) ion on the Hg-site in HgM2Can-1Cun0y (M=Ba or Sr, n=l~4) has been studied. The flux pinning behavior in these Hg-based...

    K. Kishio, J. Shimoyama, K. Yamaura, Z. Hiroi in Advances in Superconductivity VIII (1996)

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    Chapter and Conference Paper

    Superconductivity in the Infinite-Layer Phase Stabilized Under High Pressure

    Cupric-oxide superconductors are complex oxides involving counter cations like rare-earth and alkaline-earth ions. Counter cations and cupric ions compromise with each other to coexist in a crystal by adjustin...

    M. Takano, Z. Hiroi, M. Azuma in Electronic Properties of High-Tc Superconductors (1993)

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    Chapter and Conference Paper

    The Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

    The formation process of the 2223 (high-Tc) phase in the Bi-Pb-Sr-Ca-Cu-O system has been studied for a nominal composition Bi:Pb:Sr:Ca:Cu=0.9:0.2:1:1:1.6. From this composition we obtained the high-Tc phase crys...

    H. Ito, Y. Ikeda, S. Shimomura, Z. Hiroi, M. Takano in Advances in Superconductivity II (1990)