TITLE

Relaxation times in exchange-biased nanostructures

AUTHOR(S)
Mejıa-López, José; Altbir, D.; Schuller, Iván K.
PUB. DATE
July 2003
SOURCE
Applied Physics Letters;7/14/2003, Vol. 83 Issue 2, p332
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We calculated the energy barrier, DE, for exchange-biased (EB) systems, using the ferromagnetic domain wall model. The temperature dependence of the EB is in good agreement with experimental results. For Fe-FeF[SUB2], Fe-MnF[SUB2], and Ni-NiO, ΔE is proportional to a power of the interfacial coupling constant and inversely to the ferromagnetic film thickness. The temperature and volume dependence of the relaxation time show that exchange coupling increases the superparamagnetic blocking temperature of nanostructured ferromagnets.
ACCESSION #
10220415

 

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