EXPERIMENTAL-EVIDENCE FOR BOSE-GLASS BEHAVIOR IN BI2SR2CACU2O8 CRYSTALS WITH COLUMNAR DEFECTS

被引：45

作者：

KONCZYKOWSKI, M

CHIKUMOTO, N

VINOKUR, VM

FEIGELMAN, MV

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

[2] LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.51.3957

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Giant, strongly nonlogarithmic, magnetic relaxation was observed in BSCCO-2212 crystals irradiated with 5.8-GeV Pb ions due to flux pinning in columnar defects. The underlying flux-creep mechanism was identified as a vortex-loop nucleation process proposed by Nelson and Vinokur [Phys. Rev. Lett. 68, 2398 (1992)]. The crossover in the creep regime from depinning from a single rod to variable-range hopping was observed as a function of rod density. Another type of crossover, from combined pinning involving preexisting defects to purely columnar defect pinning, was observed on crossing the irreversibility line of the pristine material. © 1995 The American Physical Society.

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页码：3957 / 3960

页数：4

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