Irreversibility line of overdoped Bi2+xSr2-(x+y)Cu1+yO6±δ at ultralow temperatures and high magnetic fields

被引：12
|
作者：
Morello, A
Jansen, AGM
Gonnelli, RS
Vedeneev, SI
机构：
[1] Max Planck Inst Festkorperforsch, High Field Magnet Lab, F-38042 Grenoble, France
[2] CNRS, F-38042 Grenoble, France
[3] Politecn Torino, Dipartimento Fis, INFM, I-10129 Turin, Italy
[4] Russian Acad Sci, PN Lebedev Phys Inst, SU-117924 Moscow, Russia
来源：
PHYSICAL REVIEW B | 2000年 / 61卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.61.9113
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The irreversible magnetization of the layered high-T-c superconductor Bi2+xSr2-(x+y)Cu1 divided by yO6+/-delta (Bi-2201) has been measured by means of a capacitive torquemeter up to B-a=28 T and down to T=60 mK. The deduced irreversibility field B-irr is in excellent agreement with the analytical form of the melting line of a three-dimensional (3D) anisotropic flux lattice as calculated from the Lindemann criterion. For a comparison, the applicability of alternative models based on quantum melting, 2D melting, and flux-creep models is discussed. Rescaling the magnetic-field dependence of the pinning-force with the irreversibility field reveals a similar magnetic-field dependence for different temperatures.
引用
收藏
页码：9113 / 9117
页数：5
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