Mechanochemical decomposition of Gd3Fe5O12 garnet phase

Joseyphus, Justin R and Narayanasamy, A and Sivakumar, N and Guyot, M and Krishnan, R and Ponpandian, N and Chattopadhyay, K (2004) Mechanochemical decomposition of Gd3Fe5O12 garnet phase. In: Proceedings of the International Conference on Magnetism (ICM 2003), JUL 27-AUG 01, 2003, Rome, ITALY.

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Abstract

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 on grain size reduction and an increase in the orthoferrite content. The Mössbauer spectrum at 16 K is characteristic of the magnetically ordered state corresponding to GdIG, GdFeO3 and α-Fe2O3 whereas at room temperature it is a superparamagnetic doublet.

Item Type:	Conference Paper
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Gadolinium iron garnet;Mechanical milling;Decomposition; Orthoferrite
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	08 Mar 2012 06:59
Last Modified:	08 Mar 2012 06:59
URI:	http://eprints.iisc.ac.in/id/eprint/43803

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