Analysis of the ferromagnetic resonance spectra of aggregates of magnetite nanoparticles formed by a magnetic field

被引：16
|
作者：
Sorokina, O. N. [1 ]
Bychkova, A. V. [1 ]
Kovarskii, A. L. [1 ]
机构：
[1] Russian Acad Sci, Emanuel Inst Biochem Phys, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 3卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
Magnetite; Dipole Interaction; Magnetite Nanoparticles; Phenomenological Theory; Ferromagnetic Resonance;
D O I：
10.1134/S1990793109020134
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 ferromagnetic resonance (FMR) spectra of magnetite nanoparticles in aqueous solutions and solid polymer films were analyzed at different particle concentrations, matrix rigidities, temperatures, external magnetic effects, and positions of flat samples in the field of the spectrometer. The formation of linear aggregates of nanoparticles under the influence of magnetic fields is the major factor that changes the FMR spectrum shape and position. The results were analyzed in terms of phenomenological theory of FMR. The applicability of the equations of phenomenological theory was verified, and the fraction of nanoparticles in linear aggregates was evaluated.
引用
收藏
页码：257 / 261
页数：5
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