High magnetostriction and coupling coefficient for sintered cobalt ferrite derived from superparamagnetic nanoparticles

TitleHigh magnetostriction and coupling coefficient for sintered cobalt ferrite derived from superparamagnetic nanoparticles
Publication TypeJournal Article
Year of Publication2012
AuthorsMohaideen, KKhaja, Joy, PAlias
JournalApplied Physics Letters
Volume101
Issue7
Pagination072405
Date PublishedAUG
ISSN0003-6951
Abstract

High magnetostriction (lambda) and coupling coefficient (d lambda/dH) of 315 ppm and 1.97 x 10(-9) A(-1) m, respectively, are obtained at room temperature for sintered cobalt ferrite derived from nanocrystalline powders. Also, the powder was compacted at a low pressure of 8 MPa and sintered for a short duration of 10 min at 1450 degrees C. Magnetic annealing at 300 degrees C in a field of 0.5 T for 30 min further enhanced the magnetostriction coefficient to 345 ppm with a higher coupling coefficient 2.12 x 10(-9) A(-1)m. The magnetic field above which maximum magnetostriction is observed is reduced by almost half after magnetic annealing. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745922]

DOI10.1063/1.4745922
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.794

Divison category: 
Physical and Materials Chemistry