Temperature dependence of the FMR spectra of polymer composites with nanocrystalline α-Fe/C filler

被引：5
|
作者：
Guskos, N. [1 ,2 ]
Maryniak, M. [2 ]
Typek, J. [2 ]
Pelech, I. [3 ]
Narkiewicz, U. [3 ]
Roslaniec, Z. [4 ]
Kwiatkowska, M. [4 ]
机构：
[1] Univ Athens, Solid State Sect, Dept Phys, Athens 15784, Greece
[2] Tech Univ Szczecin, Inst Phys, PL-70310 Szczecin, Poland
[3] Tech Univ Szczecin, Inst Chem & Environm Engn, PL-70322 Szczecin, Poland
[4] Tech Univ Szczecin, Inst Mat Engn, PL-70310 Szczecin, Poland
来源：
DOPED NANOPOWDERS: SYNTHESIS, CHARACTERISATION APPLICATIONS | 2007年 / 128卷
关键词：
magnetic nanoparticles; magnetic resonance;
D O I：
10.4028/www.scientific.net/SSP.128.213
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Two different concentrations of nanocrystalline material: alpha-Fe/C were prepared by the carburization of nanocrystalline iron and characterized by XRD and SEM. The nanoparticles were next used as fillers in polymer nanocomposites using the in situ polycondensation reaction in a poly(ether-ester) matrix with two concentrations: 0. 1 wt. % and 0.3 wt.%. The temperature dependence of the ferromagnetic resonance (FMR) spectra was investigated to study magnetic interactions in the compounds. The introduced FMR parameters (intensity and position of the right peak) describe well the temperature dependence of FMR spectra of strongly interacting magnetic nanciparticles. The FMR spectra depend strongly on the concentration of magnetic nanoparticles, which influence the magnetic interactions between them. Two main critical points of the matrix (the glass state and the freezing of benzene rings) influence the behaviour of the FMR spectra.
引用
收藏
页码：213 / +
页数：2
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