On the possibility of antiferromagnetic vortex cores in superconducting YBa2Cu3O7-δ

被引：17

作者：

Vaknin, D ^{[1
]}

Zarestky, JL ^{[1
]}

Miller, LL ^{[1
]}

机构：

[1] Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA

来源：

PHYSICA C | 2000年 / 329卷 / 02期

关键词：

superconductivity; antiferromagnetism; vortex core; YBa2Cu3O7;

D O I：

10.1016/S0921-4534(99)00558-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Neutron scattering studies of optimally doped single crystal YBa2Cu3O7-delta under applied magnetic field were used to assess the existence of antiferromagnetic (AF) correlations in vortices. In the superconducting (SC) state, a very weak signal at the (1/2 1/2 0) reciprocal lattice point was found. It is argued that this signal can be associated with AF correlations in vortex cores. An upper-limit average magnetic moment per vortex in each layer is estimated. Above T-c, weak paramagnetic scattering was observed, which we hypothesize is due to scattering from nearest-neighbor copper spins that are coupled ferromagnetically by a hole on an oxygen site between them. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：109 / 113

页数：5

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