Model for the low-temperature magnetic phases observed in doped YBa2Cu3O6+x

被引：5

作者：

Andersen, NH ^{[1
]}

Uimin, G ^{[1
]}

机构：

[1] LD LANDAU THEORET PHYS INST,CHERNOGOLOVKA 142432,MOSCOW DISTRICT,RUSSIA

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.56.10840

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A classical statistical model for the antiferromagnetic ordering of the Cu spins in the CuO2 planes of reduced YBa2Cu3O6+x-type materials is presented. The magnetic phases considered are the experimentally observed high-temperature antiferromagnetic (AFI) phase with ordering vector Q(I)=(1/2 1/2 0), and the low- temperature phases: antiferromagnetic (AFII) with Q(II)=(1/2 1/2 1/2) and intermediate Turn-Angle (TA) phases TAI, TAII, and TAIII with components of both ordering vectors. It is shown that the AFII and TA phases result from an effective ferromagnetic-type coupling mediated by free spins in the CuOx basal plane. Good agreement with experimental data is obtained for realistic model parameters. [S0163-1829(97)08041-7].

引用

页码：10840 / 10843

页数：4

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