Electrical and magnetic behaviour of nanostructured MgFe2O4 spinel ferrite

被引：109

作者：

Sivakumar, N. ^{[1
]}

Narayanasamy, A. ^{[1
]}

Greneche, J. -M.

Murugaraj, R. ^{[2
]}

Lee, Y. S. ^{[3
]}

机构：

[1] Univ Madras, Dept Nucl Phys, Ctr Mat Sci, Madras 600025, Tamil Nadu, India

[2] Anna Univ, Madras Inst Technology, Dept Appl Sci & Humanities, Madras 600044, Tamil Nadu, India

[3] Chonnam Natl Univ, Fac Appl Chem Engn, Kwangju 500757, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷 / 02期

关键词：

Nanostructured MgFe2O4; High-energy ball milling; Cation distribution; Electrical behaviour; Mossbauer spectroscopy; NANOCRYSTALLINE NIFE2O4 SPINEL; MG-ZN FERRITES; MAGNESIUM FERRITE; DIELECTRIC BEHAVIOR; AC CONDUCTIVITY; ENHANCED MAGNETIZATION; MECHANOCHEMICAL ROUTE; CATION DISTRIBUTION; IONIC CONDUCTORS; AMORPHOUS ALLOY;

D O I：

10.1016/j.jallcom.2010.05.125

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanostructured MgFe2O4 spinel has been synthesized with various grain sizes ranging from 72 to 19 nm using ceramic method and followed by high-energy ball milling. The observed electrical conductivity decreases with grain size is mainly due to the size effect than the cation distribution which is clearly evident by in-field Mossbauer measurement. The saturation magnetization of the 72 nm grain size sample has been enhanced and it is about 39% larger than that of their bulk (micron size particle). The observed increase in the coercivity of the milled sample is due to the smaller crystalline size, increase in the grain boundary volume and also due to surface anisotropy of increasing number of ions on the surface. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：395 / 402

页数：8

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