Neel temperature enhancement in nanostructured nickel zinc ferrite

Ponpandian, N and Narayanasamy, A and Chinnasamy, CN and Sivakumar, N and Greneche, JM and Chattopadhyay, K and Shinoda, K and Jeyadevan, B and Tohji, K (2005) Neel temperature enhancement in nanostructured nickel zinc ferrite. In: Applied Physics Letters, 86 (19). pp. 192510-1.

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Abstract

The Neel temperature of Ni0.5Zn0.5Fe2O4 spinel ferrite increases significantly from 538 K in the bulk state to 592 K when the grain size is reduced to 16 nm by milling in a high-energy ball mill. This has been attributed to an increase in the AB superexchange interaction strength due to a possible enhancement in the magnetic ion concentration in the A-site on milling, as is evident from extended x-ray absorption fine structure and in-field Mossbauer measurements. (c) 2005 American Institute of Physics.

Item Type:	Journal Article
Publication:	Applied Physics Letters
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Keywords:	Magnetic-Properties;Particles;Mossbauer;Spinel
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	04 Feb 2010 09:35
Last Modified:	19 Sep 2010 04:56
URI:	http://eprints.iisc.ac.in/id/eprint/17230

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