High magnetostriction coefficient of Mn substituted cobalt ferrite sintered from nanocrystalline powders and after magnetic field annealing

TitleHigh magnetostriction coefficient of Mn substituted cobalt ferrite sintered from nanocrystalline powders and after magnetic field annealing
Publication TypeJournal Article
Year of Publication2013
AuthorsMohaideen, KKhaja, Joy, PAlias
JournalCurrent Applied Physics
Volume13
Issue8
Pagination1697-1701
Date PublishedOCT
ISSN1567-1739
KeywordsCobalt ferrite, Magnetic field annealing, Magnetostriction, Mn substitution, Nanocrystalline
Abstract

Magnetostriction characteristics of Mn substituted cobalt ferrite, CoFe2-xMnxO4 (0 <= x <= 0.3), sintered from nanocrystalline powders of average particle size of similar to 4 nm have been studied. Larger value of magnetostriction at lower magnetic field is achieved after substitution of Mn for Fe. The maximum value of magnetostriction coefficient is not much affected and the slope of the magnetostriction is increased with increasing Mn content. Higher maximum value of magnetostriction coefficient (lambda) of 234 ppm comparable to that of the unsubstituted composition with larger strain derivative (d lambda/dH) is obtained for x = 0.2 in CoFe2-xMnxO4. The magnetostriction coefficient is increased to 262 ppm with further enhancement in the strain derivative after annealing the sintered compact at 300 degrees C in a magnetic field of 400 kA/m for 30 min. (C) 2013 Elsevier B.V. All rights reserved.

DOI10.1016/j.cap.2013.06.030
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.026

Divison category: 
Physical and Materials Chemistry