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Article
Open AccessDimensional reduction and incommensurate dynamic correlations in the \(S=\frac{1}{2}\) triangular-lattice antiferromagnet Ca3ReO5Cl2
The observation of spinon excitations in the \(S=\frac{1}{2}\) S = ...
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Article
Open AccessA series of magnon crystals appearing under ultrahigh magnetic fields in a kagomé antiferromagnet
Geometrical frustration and a high magnetic field are two key factors for realizing unconventional quantum states in magnetic materials. Specifically, conventional magnetic order can potentially be destroyed b...
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Article
Open AccessAuthor Correction: Two-magnon scattering in the 5d all-in-all-out pyrochlore magnet Cd2Os2O7
A correction to this article has been published and is linked from the HTML version of this article.
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Article
Open AccessMaximizing T c by tuning nematicity and magnetism in FeSe1−x S x superconductors
A fundamental issue concerning iron-based superconductivity is the roles of electronic nematicity and magnetism in realising high transition temperature (T c). To address this issue, FeSe ...
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Article
Open AccessTwo-magnon scattering in the 5d all-in-all-out pyrochlore magnet Cd2Os2O7
5d pyrochlore oxides with all-in-all-out magnetic order are prime candidates for realizing strongly correlated, topological phases of matter. Despite significant effort, a full understanding of all-in-all-out ma....
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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...
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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, ...
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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...
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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...
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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...
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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.
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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...
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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...
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Article
Absence of superconductivity in the doped antiferromagnetic spin-ladder compound (La,Sr)CuO2.5
A SPIN-½ Heisenberg antiferromagnetic ladder is a model system comprising parallel chains of interacting elemental spins. Spin ladders having an even number of chains have been predicted1á¤-6 to exhibit interesti...
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Article
Probable hole-doped superconductivity without apical oxygens in (Ca, Na)2CuO2CI2
THE presence of apical oxygens (above or below the CuO2 planes) has been regarded as indispensable for the occurrence of hole-doped superconductivity in the high-transition-temperature (high-Tc) copper oxide supe...
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Article
A new family of copper oxide superconductors Srn+1CunO2n+1+δ stabilized at high pressure
THE search for new copper oxide superconductors1 has been pursued mainly by exploring a range of chemical compositions (counter-cations and oxygen content) and reaction temperatures. We have explored the effects ...
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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...
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Article
Superconductivity at 110 K in the infinite-layer compound (Sr1-xCax)1-yCuO2
THE 'infinite-layer' parent structure1 of the copper oxide superconductors (Fig. 1) is the simplest structure containing the CuO2 sheets that are apparently essential to high-transition-temperature (high-Tc) supe...
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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...
