Is MnSi an Itinerant-Electron Magnet? Results of ESR Experiments

被引：21

作者：

Demishev, S. V. ^{[1
]}

Semeno, A. V. ^{[1
]}

Bogach, A. V. ^{[1
]}

Glushkov, V. V. ^{[1
]}

Sluchanko, N. E. ^{[1
]}

Samarin, N. A. ^{[1
]}

Chernobrovkin, A. L. ^{[1
]}

机构：

[1] Russian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, Russia

来源：

JETP LETTERS | 2011年 / 93卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

FERROMAGNET MNSI; FIELD;

D O I：

10.1134/S0021364011040072

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-frequency (60 GHz) electron spin resonance (ESR) has been studied in manganese monosilicide, MnSi, single crystals. The measurements performed within the 4.2-300 K temperatures range at the applied magnetic field up to 70 kOe have demonstrated that the magnetic resonance in MnSi is due to localized magnetic moments of the Heisenberg type with the g-factor depending only slightly on temperature, g similar to 1.9-2. At the same time, it has been found that the ESR linewidth is determined by spin fluctuations and can be quantitatively described in the wide temperature range (4.2 K < T < 60 K) in the framework of the Moriya theory using the S-L(T) function. The revealed deviations from the model of weak itinerant-electron magnetism commonly used for the description of the magnetic properties of MnSi indicate a possible spin-polaron nature of the unusual magnetic properties of this strongly correlated metal.

引用

页码：213 / 218

页数：6

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