Synthesis and structural characterization of LaOFeP superconductors

被引：38

作者：

Liang, C. Y. ^{[1
]}

Che, R. C. ^{[1
]}

Yang, H. X. ^{[1
]}

Tian, H. F. ^{[1
]}

Xiao, R. J. ^{[1
]}

Lu, J. B. ^{[1
]}

Li, R. ^{[1
]}

Li, J. Q. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 07期

关键词：

D O I：

10.1088/0953-2048/20/7/017

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High quality LaOFeP superconducting materials have been successfully synthesized by a two- step solid reaction method. We first prepared a La - Fe - P ternary alloy following a pre- alloying treatment; the resultant La - Fe - P ternary alloy was found to be the key precursor for producing the final LaOFeP superconductors in our experiments. The LaOFeP samples in general have a superconducting transition temperature of about T-c approximate to 4.1 K as demonstrated by the measurements of resistivity and magnetic susceptibility. The volume ratio of the superconducting phase in the high quality sample is estimated to be as high as 95% at the temperature of 2 K. Structural analysis by means of x- ray diffraction, electron diffraction and high resolution transmission electron microscopy shows that the LaOFeP crystal has a layered tetragonal structure with a P4/nmm space group. Structural defects such as stacking faults in the LaOFeP sample have also been briefly discussed.

引用

页码：687 / 690

页数：4

共 15 条

[1] Coexistence of superconductivity and ferromagnetism in URhGe [J].