X-ray diffraction study of spontaneous strain in the iron-based superconductor Sr4V2Fe2As2O6-δ

被引：1

作者：

Saito, Masahiro ^{[1
]}

Fujishita, Hideshi ^{[2
]}

Okamoto, Hiroyuki ^{[3
]}

Kobayashi, Yoshiaki ^{[4
]}

Sato, Masatoshi ^{[5
]}

机构：

[1] Kanazawa Univ, Div Math & Phys Sci, Kanazawa, Ishikawa 9201192, Japan

[2] Kanazawa Univ, Sch Math & Phys, Kanazawa, Ishikawa 9201192, Japan

[3] Kanazawa Univ, Sch Hlth Sci, Kanazawa, Ishikawa 9200942, Japan

[4] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan

[5] Comprehens Res Org Sci & Soc, Res Ctr Neutron Sci & Technol, Tokai, Ibaraki 3191106, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2015年 / 519卷

关键词：

Iron based superconductor; X-ray diffraction; Spontaneous strain; THERMAL-EXPANSION;

D O I：

10.1016/j.physc.2015.08.014

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The lattice parameters of the iron based superconductor Sr4V2Fe2As2O6-delta were measured by the X-ray diffraction method between 10 K and 270 K. Anomalous changes in the lattice parameter c could be clearly detected at the magnetic phase transition and the superconducting transition. Based on the Landau theory of phase transition, these anomalies can be attributed to a spontaneous strain caused by the coupling between the strain and an order parameter. The signs of the uniaxial pressure derivative along the c axis of the transition temperatures are estimated using the Ehrenfest relation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：142 / 146

页数：5

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