Mechanochemical decomposition of Gd3Fe5O12 garnet phase

Joseyphus, R. Justin ; Narayanasamy, A. ; Sivakumar, N. ; Guyot, M. ; Krishnan, R. ; Ponpandian, N. ; Chattopadhyay, K. (2004) Mechanochemical decomposition of Gd3Fe5O12 garnet phase Journal of Magnetism and Magnetic Materials, 272-276 (3). pp. 2257-2259. ISSN 0304-8853

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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 a-Fe2O3 whereas at room temperature it is a superparamagnetic doublet.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Gadolinium Iron Garnet; Mechanical Milling; Decomposition; Orthoferrite
ID Code:6589
Deposited On:22 Oct 2010 06:31
Last Modified:30 May 2011 08:38

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