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Title: Effects of composition on the stability of the magnetic order of ferrimagnetic multilayers
Authors: Dantas, Ana L.
Vieira, Selma R.
Carriço, Artur da Silva
Keywords: Induced instability;Ferrimagnetic multilayers
Issue Date: 2002
Publisher: APS PHYSICS
Citation: DANTAS, Ana L. ; VIEIRA, Selma R.; CARRIÇO, Artur da Silva. Effects of composition on the stability of the magnetic order of ferrimagnetic multilayers. Physical Review B - Condensed Matter and Materials Physics, Estados Unnidos, v. 65, n.17, p. 17241, 2002. Disponível em: Acesso em: 24 mar. 2020.
Portuguese Abstract: We study the field induced instability of the antiferromagnetic phase of magnetic multilayers consisting of a stacking of uniaxial ferromagnetic films, F1 and F2, with thicknesses t1 and t2, coupled through a nonmagnetic ~NM! spacer. The external field is along the uniaxial axis, in the plane of the films, and the composition is varied by choosing arbitrary values of the relative thickness b5t1 /t2. We calculate the critical value of the external field H*, and examine the nature of the phase transition. We find that H* does not change with the multilayer thickness in the case of multilayers with an even number of magnetic layers, (@F1 /NM/F2 /NM#n , n arbitrary!. The nature of the phase transition and the critical field depend on the value of b, and the minimum value of H* corresponds to b51. For a multilayer with an odd number of magnetic layers we find that the thickness dependence of the critical field is significantly affected by the value of b.
Appears in Collections:CCET - DFTE - Artigos publicados em periódicos

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