Flux-line lattice structures in untwinned YBa2Cu3O7-δ

被引：52

作者：

Johnson, ST ^{[1
]}

Forgan, EM

Lloyd, SH

Aegerter, CM

Lee, SL

Cubitt, R

Kealey, PG

Ager, C

Tajima, S

Rykov, A

Paul, DM

机构：

[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[3] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[5] ISTEC, Superconduct Res Lab, Tokyo 135, Japan

[6] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[7] Univ Paris Sud, Phys Solides Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.82.2792

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A small angle neutron scattering study of the flux-line lattice in a large untwinned single crystal of YBa2Cu3O7-delta is presented. In fields parallel to the c axis, diffraction spots are observed corresponding to four orientations of a hexagonal lattice, distorted by the a-b anisotropy, A value for the anisotropy, the penetration depth ratio, of lambda(a)/lambda(b) = 1.18(2) was obtained. The high quality of the data is such that second-order diffraction is observed. indicating a well ordered FLL. With the field at 33 degrees to c, a field dependent reorientation of the lattice is observed around 3 T. [S0031-9007(99)08812-2].

引用

页码：2792 / 2795

页数：4

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