Upper critical magnetic field in Ba0.68K0.32Fe2As2 and Ba(Fe0.93Co0.07)2As2
Upper critical magnetic field in Ba0.68K0.32Fe2As2 and Ba(Fe0.93Co0.07)2As2
复制标题
Ba0 68K0 32Fe2As2 和 Ba(Fe0 93Co0 07)2As2 的上临界磁场
DOI:
10.1134/s0021364011110038
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发表时间:
2011
期刊:
影响因子:
1.3
通讯作者:
J. Wosnitza
中科院分区:
文献类型:
--
作者:
V. A. Gasparov;L. Drigo;A. Audouard;D. L. Sun;C. T. Lin;S. L. Bud’ko;P. C. Canfield;F. Wolff-Fabris;J. Wosnitza
We report measurements of the temperature dependence of the radio frequency magnetic penetration depth in Ba0.68K0.32Fe2As2and Ba(Fe0.93Co0.07)2As2single crystals in pulsed magnetic fields up to 60 T. From our data, we construct anH-T-phase diagram for the inter-plane (H‖c) and in-plane (H‖ab) directions for both compounds. For both field orientations in Ba0.68K0.32Fe2As2we find a concave curvature of theHc2(T) lines with decreasing anisotropy and saturation towards lower temperature. Taking into account Pauli spin paramagnetism we can describeHc2(T) and its anisotropy. In contrast, we find that Pauli paramagnetic pair breaking is not essential for Ba(Fe0.93Co0.07)2As2. For this electron-doped compound, the data support aHc2(T) dependence that can be described by the Werthamer-Helfand-Hohenberg model forH‖aband a two-gap behavior forH‖c.
影响因子:
1.3
作者:
V. Gasparov;F. Wolff-Fabris;D. Sun;C. Lin;J. Wosnitza
通讯作者:
V. Gasparov;F. Wolff-Fabris;D. Sun;C. Lin;J. Wosnitza
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
L. Drigo;F. Durantel;A. Audouard;G. Ballon
通讯作者:
G. Ballon