Superconducting state of silver-oxide clathrate Ag6O 8AgNO3

Kenji Kawashima; Masaru Ishii; Hirotaka Okabe; Jun Akimitsu; Markus Kriener; Hiroshi Takatsu; Shingo Yonezawa; Yoshiteru Maeno

doi:10.1143/JPSJ.77.024707

Superconducting state of silver-oxide clathrate Ag₆O ₈AgNO₃

Kenji Kawashima, Masaru Ishii, Hirotaka Okabe, Jun Akimitsu, Markus Kriener, Hiroshi Takatsu, Shingo Yonezawa, Yoshiteru Maeno

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

We report the normal-state and superconducting properties of the silver-oxide clathrate Ag₆O₈AgNO₃. Electrical resistivity, specific heat, and DC and AC susceptibility measurements as functions of magnetic field and temperature show phase transitions near 90 and 185 K. We find that Ag₆O₈AgNO₃ is a bulk superconductor with the superconducting transition temperature T_c = 1.04 K. We observe a clear kink structure in the field dependence of the real part of AC susceptibility, suggesting a change in vortex state. Furthermore, we present the H-T phase diagram of this compound and estimate the upper critical field H_c2(0) to be about 770 Oe. We also discuss the superconducting properties in a Ginzburg-Landau framework.

Original language	English
Article number	024707
Journal	journal of the physical society of japan
Volume	77
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.77.024707
Publication status	Published - Feb 1 2008
Externally published	Yes

Keywords

AC susceptibility
AgOAgNO
Silver-oxide clathrate
Superconductivity

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.77.024707

Cite this

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title = "Superconducting state of silver-oxide clathrate Ag6O 8AgNO3",

abstract = "We report the normal-state and superconducting properties of the silver-oxide clathrate Ag6O8AgNO3. Electrical resistivity, specific heat, and DC and AC susceptibility measurements as functions of magnetic field and temperature show phase transitions near 90 and 185 K. We find that Ag6O8AgNO3 is a bulk superconductor with the superconducting transition temperature Tc = 1.04 K. We observe a clear kink structure in the field dependence of the real part of AC susceptibility, suggesting a change in vortex state. Furthermore, we present the H-T phase diagram of this compound and estimate the upper critical field Hc2(0) to be about 770 Oe. We also discuss the superconducting properties in a Ginzburg-Landau framework.",

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T1 - Superconducting state of silver-oxide clathrate Ag6O 8AgNO3

AU - Kawashima, Kenji

AU - Ishii, Masaru

AU - Okabe, Hirotaka

AU - Akimitsu, Jun

AU - Kriener, Markus

AU - Takatsu, Hiroshi

AU - Yonezawa, Shingo

AU - Maeno, Yoshiteru

PY - 2008/2/1

Y1 - 2008/2/1

N2 - We report the normal-state and superconducting properties of the silver-oxide clathrate Ag6O8AgNO3. Electrical resistivity, specific heat, and DC and AC susceptibility measurements as functions of magnetic field and temperature show phase transitions near 90 and 185 K. We find that Ag6O8AgNO3 is a bulk superconductor with the superconducting transition temperature Tc = 1.04 K. We observe a clear kink structure in the field dependence of the real part of AC susceptibility, suggesting a change in vortex state. Furthermore, we present the H-T phase diagram of this compound and estimate the upper critical field Hc2(0) to be about 770 Oe. We also discuss the superconducting properties in a Ginzburg-Landau framework.

AB - We report the normal-state and superconducting properties of the silver-oxide clathrate Ag6O8AgNO3. Electrical resistivity, specific heat, and DC and AC susceptibility measurements as functions of magnetic field and temperature show phase transitions near 90 and 185 K. We find that Ag6O8AgNO3 is a bulk superconductor with the superconducting transition temperature Tc = 1.04 K. We observe a clear kink structure in the field dependence of the real part of AC susceptibility, suggesting a change in vortex state. Furthermore, we present the H-T phase diagram of this compound and estimate the upper critical field Hc2(0) to be about 770 Oe. We also discuss the superconducting properties in a Ginzburg-Landau framework.

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KW - AgOAgNO

KW - Silver-oxide clathrate

KW - Superconductivity

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