Magnetic properties of MnFe2O4 nanoparticles

被引：55
作者：
Balaji, G
Gajbhiye, NS [1 ]
Wilde, G
Weissmüller, J
机构：
[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany
[2] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 242卷
关键词：
ferrites; fine particles; specific heat; spin freezing;
D O I：
10.1016/S0304-8853(01)01043-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In zero field cooled and field cooled measurements of nanosized MnFe2O4, two peaks were observed and the one at high temperature was attributed to the typical superparamagnetic blocking of moments of the particles. A weak maximum occurs at the temperature around 21 K, which is attributed to the freezing of moments at the surface of the particles. In the specific heat measurements, a sharp change was observed near the freezing temperature. The transition temperature observed in the specific heat was found to be field dependent. (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：617 / 620
页数：4
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