Thermodynamic properties of the clathrate-type silver-oxide Ag sub(6O) sub(8)AgHF sub(2)

We report normal-state and superconducting properties of the clathrate-type silver-oxide Ag sub(6O) sub(8)AgHF sub(2. We present electrical resistivity, DC- and AC-susceptibility and specific-heat measurements of single crystalline Ag) sub(6)O sub(8AgHF) sub(2). In the normal state, Ag sub(6O) sub(8...

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Veröffentlicht in:Physica. C, Superconductivity Superconductivity, 2008-03, Vol.468 (6), p.464-470
Hauptverfasser: Kawashima, K, Kriener, M, Ishii, M, Maeno, Y, Akimitsu, J, ..Jb, Pacs: o-B, ..Ha
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Sprache:eng
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Zusammenfassung:We report normal-state and superconducting properties of the clathrate-type silver-oxide Ag sub(6O) sub(8)AgHF sub(2. We present electrical resistivity, DC- and AC-susceptibility and specific-heat measurements of single crystalline Ag) sub(6)O sub(8AgHF) sub(2). In the normal state, Ag sub(6O) sub(8)AgHF sub(2 exhibits metallic conductivity and a phase transition near 110 K, possibly a structural phase transition as observed in the related compound Ag) sub(6)O sub(8AgNO) sub(3). The onset of superconductivity of our samples is observed around 1.2-1.5 K, and the H-T phase diagram is determined for the first time. The upper critical field H sub(c2(0) is estimated to be about 2000-2200 Oe and the coherence length [xi]) sub(G)L(0) to be 40 nm.
ISSN:0921-4534
DOI:10.1016/j.physc.2008.01.008