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

被引：27
|
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.
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页数：5
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