High-Pressure Study on the Superconducting Pyrochlore Oxide Cd 2Re2O7

Zenji Hiroi; Touru Yamauchi; Takahiro Yamada; Masafumi Hanawa; Yasuo Ohishi; Osamu Shimomura; Melike Abliz; Masato Hedo; Yoshiya Uwatoko

doi:10.1143/JPSJ.71.1553

High-Pressure Study on the Superconducting Pyrochlore Oxide Cd ₂Re₂O₇

Zenji Hiroi, Touru Yamauchi, Takahiro Yamada, Masafumi Hanawa, Yasuo Ohishi, Osamu Shimomura, Melike Abliz, Masato Hedo, Yoshiya Uwatoko

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

9 Citations (Scopus)

Abstract

Superconducting and structural phase transitions in a pyrochlore oxide Cd₂Re₂O₇ are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure P_c = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT² term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.

Original language	English
Pages (from-to)	1553-1557
Number of pages	5
Journal	journal of the physical society of japan
Volume	71
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.71.1553
Publication status	Published - 2002 Jun
Externally published	Yes

Keywords

CdReO
Electrical resistivity
High pressure
Phase transition
Pyrochlore oxide
Superconductivity
X-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.71.1553

Cite this

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title = "High-Pressure Study on the Superconducting Pyrochlore Oxide Cd 2Re2O7",

abstract = "Superconducting and structural phase transitions in a pyrochlore oxide Cd2Re2O7 are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure Pc = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT2 term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.",

keywords = "CdReO, Electrical resistivity, High pressure, Phase transition, Pyrochlore oxide, Superconductivity, X-ray diffraction",

author = "Zenji Hiroi and Touru Yamauchi and Takahiro Yamada and Masafumi Hanawa and Yasuo Ohishi and Osamu Shimomura and Melike Abliz and Masato Hedo and Yoshiya Uwatoko",

year = "2002",

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pages = "1553--1557",

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publisher = "Physical Society of Japan",

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TY - JOUR

T1 - High-Pressure Study on the Superconducting Pyrochlore Oxide Cd 2Re2O7

AU - Hiroi, Zenji

AU - Yamauchi, Touru

AU - Yamada, Takahiro

AU - Hanawa, Masafumi

AU - Ohishi, Yasuo

AU - Shimomura, Osamu

AU - Abliz, Melike

AU - Hedo, Masato

AU - Uwatoko, Yoshiya

PY - 2002/6

Y1 - 2002/6

N2 - Superconducting and structural phase transitions in a pyrochlore oxide Cd2Re2O7 are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure Pc = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT2 term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.

AB - Superconducting and structural phase transitions in a pyrochlore oxide Cd2Re2O7 are studied under high pressure by x-ray diffraction and electrical resistivity measurements. A rich P-T phase diagram is obtained, which contains at least two phases with the ideal and slightly distorted pyrochlore structures. It is found that the transition between them is suppressed with increasing pressure and finally disappears at a critical pressure Pc = 3.5 GPa. Remarkable enhancements in the residual resistivity as well as the coefficient A of the AT2 term in the resistivity are found around the critical pressure. Superconductivity is detected only for the phase with the structural distortion.

KW - CdReO

KW - Electrical resistivity

KW - High pressure

KW - Phase transition

KW - Pyrochlore oxide

KW - Superconductivity

KW - X-ray diffraction

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