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Anisotropy of the upper critical field and critical current in single crystal MgB2 -: art. no. 180502

被引：165
作者：
Lyard, L
Samuely, P
Szabo, P
Klein, T
Marcenat, C
Paulius, L
Kim, KHP
Jung, CU
Lee, HS
Kang, B
Choi, S
Lee, SI
Marcus, J
Blanchard, S
Jansen, AGM
Welp, U
Karapetrov, G
Kwok, WK
机构：
[1] CNRS, Etud Proprietes Elect Solides Lab, F-38042 Grenoble 9, France
[2] CEA Grenoble, DRFMC SPSMS, F-38054 Grenoble 9, France
[3] Univ Grenoble 1, F-38041 Grenoble 9, France
[4] Slovak Acad Sci, Inst Expt Phys, SK-04353 Kosice, Slovakia
[5] Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea
[6] Pohang Univ Sci & Technol, NVCRICS, Pohang 790784, South Korea
[7] CNRS, MPI, Grenoble High Magnet Field Lab, F-38042 Grenoble 9, France
[8] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 18期
关键词：
D O I：
10.1103/PhysRevB.66.180502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on specific-heat, high-magnetic-field transport, and ac-susceptibility measurements on MgB2 single crystals. The upper critical field for magnetic fields perpendicular and parallel to the basal planes is presented in the entire temperature range. A very different temperature dependence has been observed in the two directions, which yields a temperature-dependent anisotropy with Gammasimilar to5 at low temperatures and similar to2 near T-c. A peak effect is observed for mu(0)Hsimilar to2 T parallel to the c axis, and the critical current density presents a sharp maximum for H parallel to the ab plane.
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页码：1 / 4
页数：4
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