-, Geetanjali and Dube, Charu Lata and Kashyap, Subhash C. and Kotnala, R. K. (2010) Effect of Microwave Processing on Polycrystalline Hard Barium Hexaferrite. Journal of Superconductivity and Novel Magnetism, 24 (1-2). pp. 567-570. ISSN 1557-1947

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The present paper describes our results on the phase transformation (from crystalline to amorphous) of M- type hard barium hexaferrite, and consequently its conver- sion into soft ferrite by the application of magnetic energy at microwave frequency (2.45 GHz). The rapid volumetric heating of the conventionally prepared polycrystalline hexa- ferrite by microwave energy at a temperature of 950 °C in a short duration of only 5 min resulted in a decrystallized phase. The magnetic studies (M–H loops) of the resistively heated and MW processed samples have revealed a lower- ing in coercivity (from 188 to 2 mT) in the latter samples, thereby establishing the formation of soft ferrite. An attempt has also been made to understand the observed transformation from hard to soft ferrite.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Uncontrolled Keywords: Microwave processing; Barium hexaferrite; ecrystallization; Microstructure; Magnetic properties
Subjects: Applied Physics/Condensed Matter
Depositing User: Mr. Abhishek Yadav
Date Deposited: 26 Dec 2012 09:19
Last Modified: 26 Dec 2012 09:19
URI: http://npl.csircentral.net/id/eprint/870

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