Magnetic Field Dependence of Energy Barrier of Perpendicular Nanomagnet

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Based on the nudged elastic band model, we investigate the thermal energy barrier and its field dependence of a circular-shaped perpendicular nanomagnet for various exchange constants and cell sizes. We find that the energy barrier depends not only on the cell size but also on the exchange stiffness constant when the switching is governed by the domain-wall nucleation and propagation. We show that analyzing the switching probability curve based on the field-dependent energy barrier equation for the single-domain switching can underestimate the energy barrier so that one has to use the correct field dependence of energy barrier, which can be obtained numerically.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-11
Language
English
Article Type
Article; Proceedings Paper
Citation

IEEE TRANSACTIONS ON MAGNETICS, v.50, no.11

ISSN
0018-9464
DOI
10.1109/TMAG.2014.2321581
URI
http://hdl.handle.net/10203/277468
Appears in Collection
PH-Journal Papers(저널논문)
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