Structural and magnetic properties of pristine and Fe-doped NiO nanoparticles synthesized by the co-precipitation method

被引：38

作者：

Mishra, A. K. ^{[1
]}

Bandyopadhyay, S. ^{[2
]}

Das, D. ^{[1
]}

机构：

[1] Kolkata Ctr, UGC DAE Consortium Sci Res, Kolkata 70098, India

[2] Univ Coll Sci, Dept Phys, Kolkata 700009, India

来源：

MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 09期

关键词：

Nanostructures; Oxides; Magnetic properties; ROOM-TEMPERATURE FERROMAGNETISM;

D O I：

10.1016/j.materresbull.2012.05.046

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ni1-xFexO (x = 0 and 0.03) nanoparticles are synthesized by a chemical route. XRD and TEM measurements confirm phase purity and crystallinity of the nanoparticles. Fe substitution in NiO reduces considerably the average particle size of the nanoparticles. The pristine NiO sample with size. 14 nm and Fe-substituted sample having size 7 nm show room temperature ferromagnetism. The pristine NiO having 31 nm size and Fe-substituted sample with size 25 nm are found to be antiferromagnetic. The M-H and M-T behavior of the pristine and Fe-doped samples are explained with a core-shell model with an antiferromagnetic core and a ferromagnetic shell. The disordered spins at the shell give rise to a spin-glass like frozen state below 10 K. The obtained room temperature ferromagnetism in the pristine and Fe-doped NiO has been attributed to particle size effect. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：2288 / 2293

页数：6

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