VORTEX-CHAIN STATE IN BI2SR2CACU2O8+DELTA - EXPERIMENTAL-EVIDENCE FOR COEXISTENCE OF 2 VORTEX ORIENTATIONS

被引：58

作者：

GRIGORIEVA, IV ^{[1
]}

STEEDS, JW ^{[1
]}

BALAKRISHNAN, G ^{[1
]}

PAUL, DM ^{[1
]}

机构：

[1] UNIV WARWICK,DEPT PHYS,COVENTRY CV4 7AL,W MIDLANDS,ENGLAND

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.51.3765

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed study is reported by the Bitter decoration technique of the mixed vortex chain-vortex lattice phase found in tilted magnetic fields in single crystals of the highly anisotropic Bi2Sr2CaCu2O8+x (BSCCO). From the field and tilt-angle dependencies of the vortex periods in this structure we conclude that the vortex chains in BSCCO are qualitatively different from those in the moderately anisotropic and well-studied YBa2Cu3Ox. In particular, the intrachain vortex period is independent of the tilt angle cphi for a given perpendicular component of the field while the vortex period in the intervening flux-line lattice (FLL) shows a maximum vs cphi. In addition, the ratio of the number of the FLL vortices to the total number of vortices decreases rapidly for cphi>70°. Proceeding from these dependencies, we show that the observed mixed vortex phase can be explained consistently by the chain and the FLL vortices having different orientations, neither parallel to the applied field, as suggested by recent theoretical calculations. © 1995 The American Physical Society.

引用

页码：3765 / 3771

页数：7

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