Effects of Annealing under Tellurium Vapor for Fe1.03Te0.8Se0.2 Single Crystals

被引：28

作者：

Koshika, Yuta ^{[1
]}

Usui, Tomohiro ^{[1
]}

Adachi, Shintaro ^{[1
]}

Watanabe, Takao ^{[1
]}

Sakano, Kouhei ^{[2
]}

Simayi, Shalamujiang ^{[2
]}

Yoshizawa, Masahito ^{[2
]}

机构：

[1] Hirosaki Univ, Grad Sch Sci & Technol, Hirosaki, Aomori 0368561, Japan

[2] Iwate Univ, Grad Sch Engn, Morioka, Iwate 0208551, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2013年 / 82卷 / 02期

关键词：

Fe-based superconductor; Fe1+yTexSe1-x single crystal; annealing effect; resistivity; magnetic susceptibility; electron probe microanalysis (EPMA);

D O I：

10.7566/JPSJ.82.023703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this study, the effects of annealing under tellurium vapor have been investigated for Fe1.03Te0.8Se0.2 single crystals. The as-grown crystal is not superconducting. After annealing it at 400 degrees C for 250 h in tellurium (Te) vapor, it shows metallic resistivity temperature dependence below 150 K and a sharp superconducting transition at 13 K. The sample also shows a full magnetic shielding effect at low temperatures. The improvement in superconductivity has been attributed to the removal of excess Fe, which is inevitably incorporated in the as-grown crystals, by the annealing.

引用

页数：4

共 13 条

[1] Tunable (δπ, δπ)-Type Antiferromagnetic Order in α-Fe(Te,Se) Superconductors
Bao, Wei
Qiu, Y.
Huang, Q.
Green, M. A.
Zajdel, P.
Fitzsimmons, M. R.
Zhernenkov, M.
Chang, S.
Fang, Minghu
Qian, B.
Vehstedt, E. K.
Yang, Jinhu
Pham, H. M.
Spinu, L.
Mao, Z. Q.
[J]. PHYSICAL REVIEW LETTERS, 2009, 102 (24)
[2] Revised phase diagram for the FeTe1-xSex system with fewer excess Fe atoms
Dong, Chiheng
Wang, Hangdong
Li, Zujuan
Chen, Jian
Yuan, H. Q.
Fang, Minghu
[J]. PHYSICAL REVIEW B, 2011, 84 (22):
[3] Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
Fang, M. H.
Pham, H. M.
Qian, B.
Liu, T. J.
Vehstedt, E. K.
Liu, Y.
Spinu, L.
Mao, Z. Q.
[J]. PHYSICAL REVIEW B, 2008, 78 (22):
[4] Phase diagram and oxygen annealing effect of FeTe1-xSex iron-based superconductor
Kawasaki, Yasuna
Deguchi, Keita
Demura, Satoshi
Watanabe, Tohru
Okazaki, Hiroyuki
Ozaki, Toshinori
Yamaguchi, Takahide
Takeya, Hiroyuki
Takano, Yoshihiko
[J]. SOLID STATE COMMUNICATIONS, 2012, 152 (13) : 1135 - 1138
[5] Evidence for dominant Pauli paramagnetic effect in the upper critical field of single-crystalline FeTe0.6Se0.4
Khim, Seunghyun
Kim, Jae Wook
Choi, Eun Sang
Bang, Yunkyu
Nohara, Minoru
Takagi, Hidenori
Kim, Kee Hoon
[J]. PHYSICAL REVIEW B, 2010, 81 (18)
[6] Pauli-limited upper critical field of Fe1+yTe1-xSex
Lei, Hechang
Hu, Rongwei
Choi, E. S.
Warren, J. B.
Petrovic, C.
[J]. PHYSICAL REVIEW B, 2010, 81 (09)
[7] Charge-carrier localization induced by excess Fe in the superconductor Fe1+yTe1-xSex
Liu, T. J.
Ke, X.
Qian, B.
Hu, J.
Fobes, D.
Vehstedt, E. K.
Pham, H.
Yang, J. H.
Fang, M. H.
Spinu, L.
Schiffer, P.
Liu, Y.
Mao, Z. Q.
[J]. PHYSICAL REVIEW B, 2009, 80 (17):
[8] Specific-Heat Study of Superconducting and Normal States in FeSe1-xTex (0.6 ≤ x ≤ 1) Single Crystals: Strong-Coupling Superconductivity, Strong Electron-Correlation, and Inhomogeneity
Noji, Takashi
Imaizumi, Masato
Suzuki, Takumi
Adachi, Tadashi
Kato, Masatsune
Koike, Yoji
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2012, 81 (05)
[9] Growth, Annealing Effects on Superconducting and Magnetic Properties, and Anisotropy of FeSe1-xTex (0.5 ≤ x ≤ 1) Single Crystals
Noji, Takashi
Suzuki, Takumi
Abe, Haruki
Adachi, Tadashi
[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2010, 79 (08)
[10] Superconductivity at 55 K in iron-based F-doped layered quaternary compound Sm[O1-xFx] FeAs
National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, China
[J]. Chin. Phys. Lett., 2008, 6 (2215-2216): : 2215 - 2216

← 1 2 →