Chalcogen (O2, S, Se, Te) atmosphere annealing induced bulk superconductivity in Fe1+yTe1- xSex single crystal

Y. Sun; Y. Tsuchiya; T. Yamada; T. Taen; S. Pyon; Z. X. Shi; T. Tamegai

doi:10.1016/j.physc.2014.02.022

Chalcogen (O₂, S, Se, Te) atmosphere annealing induced bulk superconductivity in Fe_1+yTe_1- _xSe_x single crystal

Y. Sun, Y. Tsuchiya, T. Yamada, T. Taen, S. Pyon, Z. X. Shi, T. Tamegai

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

6 Citations (Scopus)

Abstract

We reported a detailed study of Fe_1+yTe _0.6Se_0.4 single crystals annealed in the atmosphere of chalcogens (O₂, S, Se, Te). After annealing with appropriate amount of chalcogens, Fe_1+yTe_0.6Se_0.4 single crystals show T_c higher than 14 K with a sharp transition width ∼1 K. Critical current density J_c for the annealed crystals reach a very high value ∼2-4 × 10⁵ A/cm² under zero field, and is also robust under applied field at low temperatures. Magneto-optical imaging reveal that the J_c is homogeneously distributed in the annealed crystals and isotropic in the ab-plane. Our results show that annealing in the atmosphere of chalcogens can successfully induce bulk superconductivity in Fe_1+yTe_0.6Se _0.4.

Original language	English
Pages (from-to)	12-15
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	504
DOIs	https://doi.org/10.1016/j.physc.2014.02.022
Publication status	Published - 2014 Sept 15
Externally published	Yes

Keywords

Annealing effect
Critical current density
Excess Fe
Iron chalcogenide
Magneto-optical imaging

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2014.02.022

Cite this

@article{7b372a45b2ca49538ea80c6b25cd13b6,

title = "Chalcogen (O2, S, Se, Te) atmosphere annealing induced bulk superconductivity in Fe1+yTe1- xSex single crystal",

abstract = "We reported a detailed study of Fe1+yTe 0.6Se0.4 single crystals annealed in the atmosphere of chalcogens (O2, S, Se, Te). After annealing with appropriate amount of chalcogens, Fe1+yTe0.6Se0.4 single crystals show Tc higher than 14 K with a sharp transition width ∼1 K. Critical current density Jc for the annealed crystals reach a very high value ∼2-4 × 105 A/cm2 under zero field, and is also robust under applied field at low temperatures. Magneto-optical imaging reveal that the Jc is homogeneously distributed in the annealed crystals and isotropic in the ab-plane. Our results show that annealing in the atmosphere of chalcogens can successfully induce bulk superconductivity in Fe1+yTe0.6Se 0.4.",

keywords = "Annealing effect, Critical current density, Excess Fe, Iron chalcogenide, Magneto-optical imaging",

author = "Y. Sun and Y. Tsuchiya and T. Yamada and T. Taen and S. Pyon and Shi, {Z. X.} and T. Tamegai",

note = "Funding Information: This work was partly supported by the Natural Science Foundation of China, the Ministry of Science and Technology of China (973 project: No. 2011CBA00105 ), and the Japan–China Bilateral Joint Research Project by the Japan Society for the Promotion of Science.",

year = "2014",

month = sep,

day = "15",

doi = "10.1016/j.physc.2014.02.022",

language = "English",

volume = "504",

pages = "12--15",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

}

TY - JOUR

T1 - Chalcogen (O2, S, Se, Te) atmosphere annealing induced bulk superconductivity in Fe1+yTe1- xSex single crystal

AU - Sun, Y.

AU - Tsuchiya, Y.

AU - Yamada, T.

AU - Taen, T.

AU - Pyon, S.

AU - Shi, Z. X.

AU - Tamegai, T.

N1 - Funding Information: This work was partly supported by the Natural Science Foundation of China, the Ministry of Science and Technology of China (973 project: No. 2011CBA00105 ), and the Japan–China Bilateral Joint Research Project by the Japan Society for the Promotion of Science.

PY - 2014/9/15

Y1 - 2014/9/15

N2 - We reported a detailed study of Fe1+yTe 0.6Se0.4 single crystals annealed in the atmosphere of chalcogens (O2, S, Se, Te). After annealing with appropriate amount of chalcogens, Fe1+yTe0.6Se0.4 single crystals show Tc higher than 14 K with a sharp transition width ∼1 K. Critical current density Jc for the annealed crystals reach a very high value ∼2-4 × 105 A/cm2 under zero field, and is also robust under applied field at low temperatures. Magneto-optical imaging reveal that the Jc is homogeneously distributed in the annealed crystals and isotropic in the ab-plane. Our results show that annealing in the atmosphere of chalcogens can successfully induce bulk superconductivity in Fe1+yTe0.6Se 0.4.

AB - We reported a detailed study of Fe1+yTe 0.6Se0.4 single crystals annealed in the atmosphere of chalcogens (O2, S, Se, Te). After annealing with appropriate amount of chalcogens, Fe1+yTe0.6Se0.4 single crystals show Tc higher than 14 K with a sharp transition width ∼1 K. Critical current density Jc for the annealed crystals reach a very high value ∼2-4 × 105 A/cm2 under zero field, and is also robust under applied field at low temperatures. Magneto-optical imaging reveal that the Jc is homogeneously distributed in the annealed crystals and isotropic in the ab-plane. Our results show that annealing in the atmosphere of chalcogens can successfully induce bulk superconductivity in Fe1+yTe0.6Se 0.4.

KW - Annealing effect

KW - Critical current density

KW - Excess Fe

KW - Iron chalcogenide

KW - Magneto-optical imaging

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DO - 10.1016/j.physc.2014.02.022

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