Simulation of Mossbauer spectra of superparamagnets under external fields using a many-state model

被引：1
|
作者：
Pfannes, HD
Dias, JH
Paniago, R
Magalhaes-Paniago, R
机构：
[1] Univ Fed Minas Gerais, Dept Fis, BR-30123970 Belo Horizonte, MG, Brazil
[2] Univ Estadual Montes Claros, Dept Ciencias Exatas, BR-39401089 Montes Claros, MG, Brazil
来源：
HYPERFINE INTERACTIONS | 2002年 / 141卷 / 1-4期
关键词：
D O I：
10.1023/A:1021230825918
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The magnetization in a uniaxial superparamagnetic particle is modelled by spin-phonon relaxation of a giant spin. A multi-level formalism is used to simulate Mossbauer superparamagnetic relaxation spectra of spatially uniformly oriented particles. A longitudinal (parallel to anisotropy direction) external magnetic field (B) over right arrow is admitted. Powder spectra spectra ((B) over right arrow = 0) with log-normal volume size distribution are simulated and compared with experimental spectra. Spectra with longitudinal and transversal field are simulated in the slow and fast relaxation limit.
引用
收藏
页码：193 / 198
页数：6
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