Flux-free growth of large superconducting crystal of FeSe by traveling-solvent floating-zone technique

被引：25

作者：

Ma, Mingwei ^{[1
]}

Yuan, Dongna ^{[1
]}

Wu, Yue ^{[1
]}

Zhou, Huaxue ^{[1
]}

Dong, Xiaoli ^{[1
]}

Zhou, Fang ^{[1
]}

机构：

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

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2014年 / 27卷 / 12期

基金：

中国国家自然科学基金;

关键词：

iron-based superconductor; FeSe; crystal growth; traveling-solvent floating-zone method; PHASE-DIAGRAM;

D O I：

10.1088/0953-2048/27/12/122001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A flux-free solution to the growth of large and composition homogeneous superconducting FeSe crystal is reported for the first time, which is based on the traveling-solvent floating-zone technique. The size of the crystal samples prepared by this approach is up to 15 x 6 x 2 mm(3), being far bigger than previously reported in all dimensions, and the main phase of the crystals is of a single preferred orientation along the tetragonal (101) plane. X-ray diffraction analysis identifies the main phase to be the superconducting tetragonal beta-FeSe. The superconducting transition temperature (T-C) is determined to be 9.4 K by AC magnetic susceptibility and electronic transport measurements. A nearly perfect diamagnetic shielding of -97% is observed, indicating a bulk superconductivity in the crystal sample.

引用

页数：5