Features of low-frequency spin dynamics in manganite LaMnO3 according to 139La NMR data

被引：2

作者：

Lekomtsev, S. A. ^{[1
]}

Mikhalev, K. N.

Yakubovskii, A. Yu.

Kaul, A. R.

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia

[2] Kurchatov Inst, Russian Res Ctr, Moscow 123182, Russia

[3] Moscow MV Lomonosov State Univ, Moscow 119992, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2006年 / 102卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S1063776106040170

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spin-lattice and spin-spin relaxation times of La-139 are measured in manganite LaMnO3. Analysis of the frequency dependence of the spin-lattice relaxation rate in the paramagnetic temperature rangle shows that this quantity is determined by magnetic fluctuations. The magnitude of the fluctuating field is estimated. It is shown that the correlation time for spin fluctuations varies with temperature in accordance with the Arrhenius law. The high value of the spin-spin relaxation rate in the paramagnetic region can be due to strong anisotropy of fluctuating magnetic fields at La nuclei.

引用

页码：671 / 676

页数：6

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