Mechanochemical decomposition of Gd3Fe5O12 garnet phase

被引：19

作者：

Joseyphus, RJ

Narayanasamy, A

Sivakumar, N

Guyot, M

Krishnan, R

Ponpandian, N

Chattopadhyay, K

机构：

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

[2] Lab Magnet & Opt, F-78035 Versailles, France

[3] Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

gadolinium iron garnet; mechanical milling; decomposition; orthoferrite;

D O I：

10.1016/j.jmmm.2003.12.573

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Gadolinium iron garnet was milled in a high energy ball mill to study its magnetic properties in the nanocrystalline regime. XRD reveals the decomposition of the garnet phase into Gd-orthoferrite and Gd2O3 on milling. The variation of saturation magnetization and coercivity with milling is attributed to a possible shift in the compensation temperature oil grain size reduction and an increase in the orthoferrite content. The Mossbauer spectrum at 16 K is characteristic of the magnetically ordered state corresponding to GdIG, GdFeO3 and alpha-Fe2O3 whereas at room temperature it is a superparamagnetic doublet. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：2257 / 2259

页数：3

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