Anisotropies and Homogeneities of Superconducting Properties in Iron--Platinum--Arsenide Ca10(Pt3As8)(Fe1.79Pt0.21As2)5
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概要
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We report a study on the anisotropy of superconducting properties in single crystalline Ca10(Pt4-\deltaAs8)(Fe1.79 Pt0.21As2)5 with T_{\text{c}} \sim 13.6 K. Under a field of 5 Oe, the sample reaches fully-diamagnetic state at {\sim}10 K for H \parallel c, and {\sim}8 K for H \parallel ab, indicating the presence of slight inhomogeneities. The magnetization measurements reveal fish-tail effect in the hysteresis loop for both H \parallel c and H \parallel ab. Averaged critical current densities at low magnetic fields along the c-axis and ab-plane J_{\text{c}}^{H \| c} and J_{\text{c}}^{H \| ab} at 5 K are estimated to be 0.9\times 10^{5} and 0.7\times 10^{5} A/cm2, respectively. Resistive transitions under magnetic field show broadening, which is consistent with a relatively large anisotropy of upper critical field. Magneto-optical images reveal homogenous current flow within the ab-plane.
- 2012-11-15
著者
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Tamegai Tsuyoshi
Department Of Applied Physics The University Of Tokyo
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Nakajima Yasuyuki
Department Of Applied Physics The University Of Tokyo
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Sun Yue
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Ding Qing-Ping
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Taen Toshihiro
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Nakajima Yasuyuki
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Tsuchiya Yuji
Department of Applied Physics, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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TAEN Toshihiro
Department of Applied Physics, The University of Tokyo
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