Magnetic and transport properties of iron-platinum arsenide Ca10(Pt4-δAs8)(Fe2-xPtxAs2)5 single crystal

被引：24
作者：
Ding, Qing-Ping [1 ,2 ]
Tsuchiya, Yuji [1 ]
Mohan, Shyam [1 ]
Taen, Toshihiro [1 ]
Nakajima, Yasuyuki [1 ,2 ]
Tamegai, Tsuyoshi [1 ,2 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] Transformat Res Project Iron Pnictides TRIP, JST, Bunkyo Ku, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW B | 2012年 / 85卷 / 10期
关键词：
PHASE-DIAGRAM; FLUX-CREEP; SUPERCONDUCTIVITY; TEMPERATURE; DEPENDENCE;
D O I：
10.1103/PhysRevB.85.104512
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report superconducting properties of single crystalline Ca-10(Pt4-delta As8)(Fe2-xPtxAs2)(5) by x-ray diffraction, magnetization, resistivity, and magneto-optical imaging measurements. The magnetization measurements reveal a fish-tail hysteresis loop and relatively high critical current density J(c) similar to 0.8 x 10(5) A/cm(2) at low temperatures. The exponential temperature dependence of J(c), which arises from the nonlinear effective flux-creep activation energy, has been observed. The upper critical field determined by resistive transition shows a relatively large anisotropy. The magneto-optical images reveal a homogenous current flow within the crystal.
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页数：6
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