Intrinsic pinning properties of FeSe0.5Te0.5

被引：7
|
作者：
Migita, M. [1 ]
Takikawa, Y. [1 ]
Takeda, M. [1 ]
Uehara, M. [1 ]
Kuramoto, T. [1 ]
Takano, Y. [2 ,3 ]
Mizuguchi, Y. [2 ,3 ]
Kimishima, Y. [1 ]
机构：
[1] Yokohama Natl Univ, Kimishima Lab, Dept Phys, Fac Engn,Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[3] Japan Sci & Technol Agcy, Transformat Res Project Iron Pnictides, Tokyo, Japan
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2011年 / 471卷 / 21-22期
关键词：
Critical current density; Critical state model; Magnetization; FeSe0.5Te0.5; AC SUSCEPTIBILITY; SUPERCONDUCTIVITY; MAGNETIZATION; YBA2CU3O7-DELTA; FILMS;
D O I：
10.1016/j.physc.2011.05.088
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The intrinsic pinning properties of FeSe0.5Te0.5, which is a superconductor with a critical temperature T-c of approximately 14 K, were studied through the analysis of magnetization curves obtained using an extended critical state model. For the magnetization measurements carried out with a superconducting quantum interference device (SQUID), external magnetic fields were applied parallel and perpendicular to the c-axis of the sample. The critical current density J(c) under the perpendicular magnetic field of 1 T was estimated using the Kimishima model to be equal to approximately 1.6 x 10(4), 8.8 x 10(3), 4.1 x 10(3), and 1.5 x 10(3)A/cm(2) at 5, 7, 9, and 11 K. respectively. Furthermore, the temperature dependence of J(c) was fitted to the exponential law of J(c)(0) x exp(-alpha T/T-c) up to 9K and the power law of J(c)(0) x (1 - T/T-c)(n) near T-c. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：916 / 918
页数：3
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