Low temperature electron paramagnetic resonance anomalies in Fe-based nanoparticles

被引:50
|
作者
Koksharov, YA
Gubin, SP
Kosobudsky, ID
Beltran, M
Khodorkovsky, Y
Tishin, AM
机构
[1] Beltran Inc, Brooklyn, NY 11210 USA
[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow, Russia
[3] NS Kurnakov Gen & Inorgan Chem Inst, Moscow 117907, Russia
关键词
D O I
10.1063/1.373879
中图分类号
O59 [应用物理学];
学科分类号
摘要
A study of the electron paramagnetic resonance of Fe-based nanoparticles embedded in polyethylene matrix was performed as a function of temperature ranging from 3.5 to 500 K. Nanoparticles with a narrow size distribution were prepared by the high-velocity thermodestruction of iron-containing compounds. A temperature-driven transition from superparamagnetic to ferromagnetic resonance was observed for samples with different Fe content. The unusual behavior of the spectra at about 25 K is considered evidence of a spin-glass state in iron oxide nanoparticles. (C) 2000 American Institute of Physics. [S0021-8979(00)01213-5].
引用
收藏
页码:1587 / 1592
页数:6
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