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

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 03期

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

页码：1587 / 1592

页数：6

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