Bulk superconductivity in Fe1+yTe0.6Se0.4 induced by removal of excess Fe

Wei Zhou; Yue Sun; Shuo Zhang; Jincheng Zhuang; Feifei Yuan; Xiong Li; Zhixiang Shi; Tatsuhiro Yamada; Yuji Tsuchiya; Tsuyoshi Tamegai

doi:10.7566/JPSJ.83.064704

Bulk superconductivity in Fe_1+yTe_0.6Se_0.4 induced by removal of excess Fe

Wei Zhou, Yue Sun, Shuo Zhang, Jincheng Zhuang, Feifei Yuan, Xiong Li, Zhixiang Shi, Tatsuhiro Yamada, Yuji Tsuchiya, Tsuyoshi Tamegai

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (J_c) in Fe_1+yTe _0.6Se_0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe_1+yTe_0.6Se_0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.

Original language	English
Article number	064704
Journal	journal of the physical society of japan
Volume	83
Issue number	6
DOIs	https://doi.org/10.7566/JPSJ.83.064704
Publication status	Published - 2014 Jun 15
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Bulk superconductivity in Fe1+yTe0.6Se0.4 induced by removal of excess Fe",

abstract = "Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (Jc) in Fe1+yTe 0.6Se0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe1+yTe0.6Se0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.",

author = "Wei Zhou and Yue Sun and Shuo Zhang and Jincheng Zhuang and Feifei Yuan and Xiong Li and Zhixiang Shi and Tatsuhiro Yamada and Yuji Tsuchiya and Tsuyoshi Tamegai",

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T1 - Bulk superconductivity in Fe1+yTe0.6Se0.4 induced by removal of excess Fe

AU - Zhou, Wei

AU - Sun, Yue

AU - Zhang, Shuo

AU - Zhuang, Jincheng

AU - Yuan, Feifei

AU - Li, Xiong

AU - Shi, Zhixiang

AU - Yamada, Tatsuhiro

AU - Tsuchiya, Yuji

AU - Tamegai, Tsuyoshi

PY - 2014/6/15

Y1 - 2014/6/15

N2 - Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (Jc) in Fe1+yTe 0.6Se0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe1+yTe0.6Se0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.

AB - Experimental evidences from transport, magnetic, and magneto-optical (MO) image measurements confirmed that arsenic (As) vapor annealing was another effective way to induce bulk superconductivity with isotropic, large, and homogenous superconducting critical current density (Jc) in Fe1+yTe 0.6Se0.4 single crystal. Since As is an exotic and easily detectable heavy element to Fe1+yTe0.6Se0.4 single crystal, As vapor annealing is very advantageous for the study of annealing mechanism. Detailed micro-structural and elemental analyses exclude the possibility that intercalating or doping effect may happen in the other post-annealing methods, proving that Fe reacts with As on the surface of the crystal and the reaction itself acts as a driving force to drag excess Fe out. The removal of excess Fe results in the good superconductivity performance.

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Bulk superconductivity in Fe_1+yTe_0.6Se_0.4 induced by removal of excess Fe

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