SIMPLE APPROXIMATE FORMULAS FOR THE MAGNETIC-RELAXATION TIME OF SINGLE-DOMAIN FERROMAGNETIC PARTICLES WITH UNIAXIAL ANISOTROPY

Authors
COFFEY WT CREGG PJ CROTHERS DSF WALDRON JT WICKSTEAD AW
Citation
Wt. Coffey et al., SIMPLE APPROXIMATE FORMULAS FOR THE MAGNETIC-RELAXATION TIME OF SINGLE-DOMAIN FERROMAGNETIC PARTICLES WITH UNIAXIAL ANISOTROPY, Journal of magnetism and magnetic materials, 131(3), 1994, pp. 120000301-120000303
Citations number
6
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
131
Issue
3
Year of publication
1994
Pages
120000301 - 120000303
Database
ISI
SICI code
0304-8853(1994)131:3<120000301:SAFFTM>2.0.ZU;2-T
Abstract
Approximate simple formulae valid for all barrier heights for the long itudinal relaxation time of a single domain ferromagnetic particle wit h uniaxial anisotropy are compared with the exact solution. It is conc luded that a formula based on the application of a variational princip le to the Sturm-Liouville equation associated with Brown's Fokker-Plan ck equation yields the closest approximation to the exact solution.