Enhancement of (BH)(max) in a hard-soft-ferrite nanocomposite using exchange spring mechanism

Roy, Debangsu and Kumar, PS Anil (2009) Enhancement of (BH)(max) in a hard-soft-ferrite nanocomposite using exchange spring mechanism. In: Journal of applied physics, 106 (7).

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Abstract

We have observed the exchange spring behavior in the soft (Fe3O4)-hard (BaCa2Fe16O27)-ferrite composite by tailoring the particle size of the individual phases and by suitable thermal treatment of the composite. The magnetization curve for the nanocomposite heated at 800 degrees C shows a single loop hysteresis showing the existence of the exchange spring phenomena in the composite and an enhancement of 13% in (BH)(max) compared to the parent hard ferrite (BaCa2Fe16O27). The Henkel plot provides the proof of the presence of the exchange interaction between the soft and hard grains as well as its dominance over the dipolar interaction in the nanocomposite.

Item Type:	Journal Article
Publication:	Journal of applied physics
Publisher:	American Institute of physics
Additional Information:	Copyright for this article belongs to American Institute of physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	09 Dec 2009 09:45
Last Modified:	19 Sep 2010 05:52
URI:	http://eprints.iisc.ac.in/id/eprint/24916

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