Superconductivity in LnFePO (Ln = La, Pr and Nd) single crystals

被引：37

作者：

Baumbach, R. E.

Hamlin, J. J.

Shu, L.

Zocco, D. A.

Crisosto, N. M.

Maple, M. B. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

基金：

美国国家科学基金会;

关键词：

LAYERED QUATERNARY COMPOUND; METAL;

D O I：

10.1088/1367-2630/11/2/025018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Single crystals of the compounds LaFePO, PrFePO and NdFePO have been prepared by means of a flux growth technique and studied by electrical resistivity, magnetic susceptibility and specific heat measurements. We have found that PrFePO and NdFePO display superconductivity with values of the superconducting critical temperature T-c of 3.2 and 3.1 K, respectively. The effect of annealing on the properties of LaFePO, PrFePO and NdFePO is also reported. The LnFePO (Ln = lanthanide) compounds are isostructural with the LnFeAsO(1-x)F(x) compounds that become superconducting with Tc values as high as 55K for Ln = Sm. A systematic comparison of the occurrence of superconductivity in the series LnFePO and LnFeAsO(1-x)F(x) points to a possible difference in the origin of the superconductivity in these two series of compounds.

引用

页数：14

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