Multiple Phase Transitions in Single-Crystalline Na1-δFeAs

被引：110

作者：

Chen, G. F. ^{[1
]}

Hu, W. Z. ^{[1
]}

Luo, J. L. ^{[1
]}

Wang, N. L. ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

来源：

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

关键词：

CRITICAL-FIELD; SUPERCONDUCTIVITY; TEMPERATURE; DEPENDENCE; SPIN;

D O I：

10.1103/PhysRevLett.102.227004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Specific heat, resistivity, susceptibility, and Hall coefficient measurements were performed on high-quality single-crystalline Na1-delta FeAs. This compound is found to undergo three successive phase transitions at around 52, 41, and 23 K, which correspond to structural, magnetic, and superconducting transitions, respectively. The Hall effect result indicates the development of energy gap at low temperature due to the occurrence of spin-density-wave instability. Our results provide direct experimental evidence of the magnetic ordering in the nearly stoichiometric NaFeAs.

引用

页数：4

共 46 条

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