RELAXATION OF UNIFORM MAGNETIZATION PRECESSION IN LA2CUO4 ABOVE TN

被引：19

作者：

LAZUTA, AV ^{[1
]}

机构：

[1] BP KONSTANTINOV NUCL PHYS INST,GATCHINA 188350,USSR

来源：

PHYSICA C | 1991年 / 181卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90344-X

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electron-paramagnetic-resonance (EPR) linewidth (GAMMA perpendicular-to) of La2CuO4 above T(N) is determined. It is shown that GAMMA perpendicular-to caused by the Dzyaloshinskii-Moriya interaction depends on temperature as zeta/a, whereas GAMMA perpendicular-to produced by symmetric anisotropic forces changes as (zeta/a)3, where zeta is the two-dimensional spin-correlation length and a is the lattice constant. Measurable values of GAMMA perpendicular-to are found for stoichiometric La2CuO4. The total absence of EPR signal in nonstoichiometric crystals is attributed to holes' influence on dielectric properties and spin system of these antiferromagnets.

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收藏

页码：127 / 132

页数：6

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