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

被引：162

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.

引用

页码：1 / 4

页数：4

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