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Rate-dependence of the switching field distribution in nanoscale granular magnetic materials

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4 Author(s)
Hovorka, O. ; CIC nanoGUNE Consolider, Donostia-San Sebastián, 20018, Spain ; Evans, R.F.L. ; Chantrell, R.W. ; Berger, A.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3477956 

The external field sweep-rate dependence of the intrinsic switching field distribution in perpendicular recording media is investigated. We derive a scaling relationship for switching field distributions at different sweep-rates, which we then validate by means of large-scale kinetic Monte Carlo simulations based on interacting Stoner–Wohlfarth particles. After demonstrating the possible occurrence of large differences between switching field distributions at slow time scales of conventional magnetometry and very fast processes relevant in magnetic recording, we propose a technique for extrapolating between these very different sweep-rates.

Published in:

Applied Physics Letters  (Volume:97 ,  Issue: 6 )

Date of Publication:

Aug 2010

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