J L Tholence

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The recently discovered homologous series HgBa(2)Can-1 Cun O2n+2+delta possesses remarkable properties. A superconducting transition temperature, T(c), as high as 133 kelvin has been measured in a multiphase Hg-Ba-Ca-Cu-O sample and found to be attributable to the Hg-1223 compound. Temperature-dependent electrical resistivity measurements under pressure on(More)
A cuprate superconductor containing double mercury layers was synthesized with a high-pressure, high-temperature technique. The compound, with chemical formula Hg(2)Ba(2)-Y1-xCaxCu(2)O(8-delta), contains a double HgO layer with structure similar to that of rock salt. The prototype compound Hg(2)Ba(2)YCu(2)O(8-delta) is an insulator. Superconductivity is(More)
We report here on low field dc and ac magnetic susceptibility measurements on the compounds SrCreFeq-,GaXOlg with x = 0 to x = 4. We have determined their magnetic phase diagram and proved that increasing the Ga content in the structure we cross from fernmagnetic-like ordering and spin glass reentrance t o pure spin glass behaviour and finally to the(More)
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