Phase diagram of Bi2.15Sr1.85CaCu2O8+delta in the presence of columnar defects

被引：30

作者：

Zech, D

Lee, SL

Keller, H

Blatter, G

Kes, PH

Li, TW

机构：

[1] UNIV ZURICH,INST PHYS,CH-8057 ZURICH,SWITZERLAND

[2] ETH ZURICH,CH-8093 ZURICH,SWITZERLAND

[3] LEIDEN UNIV,KAMERLINGH ONNES LAB,NL-2300 RA LEIDEN,NETHERLANDS

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.54.6129

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a combination of high-precision torque and SQUID magnetometry we investigate the irreversibility line of single-crystalline Bi2.15Sr1.85CaCu2O8+delta defected with irradiation-induced columnar pins. We find that the irreversibility line cannot be identified with a shifted melting Line but rather follows the crossover line B-rb(T) separating the single-vortex strong pinning regime from the collective weak pinning regime. Good agreement is found with a theoretical analysis accounting for the strong layering of the material.

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页码：6129 / 6132

页数：4

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