Qing-Ping Ding, Yuji Tsuchiya, Shyam Mohan, Toshihiro Taen, Yasuyuki Nakajima, Tsuyoshi Tamegai
We report superconducting properties of single crystalline Ca10(Pt4-{\delta}As8)(Fe2-xPtxAs2)5 by X-ray diffraction, magnetization, resistivity, and magneto-optical imaging measurements. The magnetization measurements reveal fish-tail hysteresis loop and relatively high critical current density Jc ~ 0.8\times105 A/cm2 at low temperatures. The exponential temperature dependence of Jc, which arises from nonlinear effective flux-creep activation energy, has been observed. Upper critical field determined by resistive transition shows a relatively large anisotropy. The magneto-optical images reveal homogenous current flow within the crystal.
View original:
http://arxiv.org/abs/1203.0099
No comments:
Post a Comment