Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

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dc.creatorWiese, N.
dc.creatorDimopoulos, T.
dc.creatorRührig, M.
dc.creatorWecker, J.
dc.creatorReiss, G.
dc.creatorNogues, J.
dc.creatorSort, J.
dc.date2006-02-26
dc.date2007-06-10
dc.date.accessioned2026-07-07T08:04:33Z
dc.date.available2026-07-07T08:04:33Z
dc.descriptionThe temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80K and 600K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field Hsat behaves like Hsat ~ H_0 (T/T_0)/sinh(T/T_0) with a characteristic temperature of T_0 = 150K. Within this model, the Fermi velocity for the Ru layer is of the order of 10^5m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru based AFi. Furthermore, a strong uniaxial anisotropy of K_u = 2x10^3 J/m^3 with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys.
dc.description4 pages, 4 figures, accepted for publication in Europhys. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0602609
dc.identifierhttp://arxiv.org/abs/cond-mat/0602609
dc.identifierdoi:10.1209/0295-5075/78/67002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/130004
dc.subjectMaterials Science
dc.titleStrong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB
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