NMR Investigation of Superconductivity and Antiferromagnetism in CaFe2As2 under Pressure

被引：45

作者：

Baek, S. -H. ^{[1
]}

Lee, H. ^{[1
]}

Brown, S. E. ^{[2
]}

Curro, N. J. ^{[3
]}

Bauer, E. D. ^{[1
]}

Ronning, F. ^{[1
]}

Park, T. ^{[1
,4
]}

Thompson, J. D. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Univ Calif Los Angeles, Dept Phys, Los Angeles, CA 90095 USA

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[4] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 22期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.102.227601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report As-75 NMR measurements in CaFe2As2, made under applied pressures up to 0.83 GPa produced by a standard clamp pressure cell. Our data reveal phase segregation of paramagnetic and antiferromagnetic (AFM) phases over a range of pressures, with the AFM phase more than 90% dominant at low temperatures. In situ rf susceptibility measurements indicate the presence of superconductivity. As-75 spin-lattice relaxation experiments indicate that the As-75 nuclei sample the superconductivity while in the magnetically ordered environment.

引用

页数：4

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