Spin dynamics in a weakly itinerant magnet from 29Si NMR in MnSi

被引：31

作者：

Corti, M.

Carbone, F.

Filibian, M.

Jarlborg, Th.

Nugroho, A. A.

Carretta, P.

机构：

[1] Univ Pavia, Dept Phys A Volta, I-27100 Pavia, Italy

[2] Univ Geneva, DPMC, CH-1211 Geneva 4, Switzerland

[3] Inst Teknol, Jurusan Fis, Bandung, Indonesia

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.75.115111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Si-29 NMR spectra and nuclear spin-lattice relaxation rate measurements in MnSi paramagnetic phase are presented. The experimental results are analyzed in the framework of the self-consistent renormalization theory for spin fluctuations, and detailed estimates of microscopic parameters describing the q and frequency dependence of the dynamical spin susceptibility are obtained. It is shown, in the light of a comparison with neutron scattering results, that some early determined parameters need to be revised. Accordingly, also the derivation of Curie-Weiss law within this model should be critically reconsidered.

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页数：5

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