Enhancement of long-range magnetic order by magnetic field in superconducting La2CuO4+y -: art. no. 014528

被引：122

作者：

Khaykovich, B

Lee, YS

Erwin, RW

Lee, SH

Wakimoto, S

Thomas, KJ

Kastner, MA

Birgeneau, RJ

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

来源：

PHYSICAL REVIEW B | 2002年 / 66卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.66.014528

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a detailed study, using neutron scattering, transport and magnetization measurements, of the interplay between superconducting (SC) and spin density wave (SDW) orders in La2CuO4+y. Both kinds of order set in below the same critical temperature. However, the SDW order grows with applied magnetic field, whereas SC order is suppressed. Most importantly, the field dependence of the SDW Bragg peak intensity has a cusp at zero field, as predicted by a recent theory of competing SDW and SC orders. This leads us to conclude that there is a repulsive coupling between the two order parameters. The question of whether the two kinds of order coexist or microscopically phase separate is discussed.

引用

页码：145281 / 145288

页数：8

共 40 条

[1]

AHARONY A, CONDMAT0201576

[2]

AHARONY A, CONDMAT0107585

[3] Resistive upper critical fields and irreversibility lines of optimally doped high-Tc cuprates [J].