Mechanochemical decomposition of $Gd_{3}Fe_{5}O_{12}$ garnet phase

Joseyphus, RJ and Narayanasamy, A and Sivakumar, N and Guyot, M and Krishnan, R and Ponpandian, N and Chattopadhyay, K (2004) Mechanochemical decomposition of $Gd_{3}Fe_{5}O_{12}$ garnet phase. In: Journal of Magnetism and Magnetic Materials, 272 (3). pp. 2257-2259.

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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 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.

Item Type:	Journal Article
Publication:	Journal of Magnetism and Magnetic Materials
Publisher:	Elsevier B.V.
Additional Information:	Copyright of this article belongs to Elsevier B.V.
Keywords:	Gadolinium iron garnet;Mechanical milling;Decomposition;Orthoferrite
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Dec 2008 05:56
Last Modified:	19 Sep 2010 04:55
URI:	http://eprints.iisc.ac.in/id/eprint/17136

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