Synthesis of large FeSe superconductor crystals via ion release/introduction and property characterization

doi:10.1088/1674-1056/25/7/077404

Abstract

Large superconducting FeSe crystals of (001) orientation have been prepared via a hydrothermal ion release/introduction route for the first time. The hydrothermally derived FeSe crystals are up to 10 mm×5 mm×0.3 mm in dimension. The pure tetragonal FeSe phase has been confirmed by x-ray diffraction (XRD) and the composition determined by both inductively coupled plasma atomic emission spectroscopy (ICP-AES) and energy dispersive x-ray spectroscopy (EDX). The superconducting transition of the FeSe samples has been characterized by magnetic and transport measurements. The zero-temperature upper critical field H_c2 is calculated to be 13.2-16.7 T from a two-band model. The normal-state cooperative paramagnetism is found to be predominated by strong spin frustrations below the characteristic temperature T_sn, where the Ising spin nematicity has been discerned in the FeSe superconductor crystals as reported elsewhere.

Keywords: FeSe superconductor hydrothermal growth via ion release/introduction upper critical field spin frustrations

Received: 25 May 2016
Revised: 30 May 2016
Accepted manuscript online:

PACS:	74.70.Xa	(Pnictides and chalcogenides)
	81.10.-h	(Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
	74.25.Op	(Mixed states, critical fields, and surface sheaths)
	75.10.Jm	(Quantized spin models, including quantum spin frustration)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11574370, 11274358, and 11190020), the National Basic Research Program of China (Grant No. 2013CB921700), and the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB07020100).

Corresponding Authors: Xiaoli Dong, Fang Zhou
E-mail: dong@iphy.ac.cn;fzhou@iphy.ac.cn

Cite this article:

Dongna Yuan(苑冬娜), Yulong Huang(黄裕龙), Shunli Ni(倪顺利), Huaxue Zhou(周花雪), Yiyuan Mao(毛义元), Wei Hu(胡卫), Jie Yuan(袁洁), Kui Jin(金魁), Guangming Zhang(张广铭), Xiaoli Dong(董晓莉), Fang Zhou(周放) Synthesis of large FeSe superconductor crystals via ion release/introduction and property characterization 2016 Chin. Phys. B 25 077404

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Synthesis of large FeSe superconductor crystals via ion release/introduction and property characterization

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