Angular dependence of the upper critical field in Bi2Sr2CuO6+δ

被引：8
|
作者：
Vedeneev, SI [1 ]
Ovchinnikov, YN
机构：
[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia
[2] Max Planck Inst Festkorperforsch, Grenoble High Magnet Field Lab, F-38042 Grenoble, France
[3] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, France
[4] Russian Acad Sci, LD Landau Theoret Phys Inst, Moscow 117940, Russia
来源：
JETP LETTERS | 2002年 / 75卷 / 04期
关键词：
D O I：
10.1134/1.1475722
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The angular dependence of the upper critical magnetic field was investigated in a wide range of temperatures in very high-quality Bi2Sr2CuO6 + delta single crystals with critical temperature T-c (midpoint) similar or equal to 9 K in magnetic fields up to 28 T. Although the typical value of the normal state resistivity ratio rho(c)/rho(ab) approximate to 10(4), the anisotropy ratio H-c2 parallel toparallel to ab/H-c2 perpendicular to ab of the upper critical fields is much smaller and shows an unexpected temperature dependence. A model based on strong anisotropy and small transparency between superconducting layers is proposed. (C) 2002 MAIK "Nauka/Interperiodica".
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页码：195 / 199
页数：5
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