Anomalous magnetoresistance in Fibonacci multilayers

Bezerra, Claudionor Gomes; Machado, Leonardo Dantas; Corrêa, Marcio Assolin; Feitosa, Carlos Chesman de Araújo; Pearson, J.E.; Hoffman, A.

Anomalous magnetoresistance in Fibonacci multilayers

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dc.contributor.author	Bezerra, Claudionor Gomes
dc.contributor.author	Machado, Leonardo Dantas
dc.contributor.author	Corrêa, Marcio Assolin
dc.contributor.author	Feitosa, Carlos Chesman de Araújo
dc.contributor.author	Pearson, J.E.
dc.contributor.author	Hoffman, A.
dc.date.accessioned	2020-07-02T21:08:24Z
dc.date.available	2020-07-02T21:08:24Z
dc.date.issued	2012-06-15
dc.description.resumo	We theoretically investigated magnetoresistance curves in quasiperiodic magnetic multilayers for two different growth directions, namely, [110] and [100]. We considered identical ferromagnetic layers separated by nonmagnetic layers with two different thicknesses chosen based on the Fibonacci sequence. Using parameters for Fe/Cr multilayers, four terms were included in our description of the magnetic energy: Zeeman, cubic anisotropy, bilinear coupling, and biquadratic coupling. The minimum energy was determined by the gradient method and the equilibrium magnetization directions found were used to calculate magnetoresistance curves. By choosing spacers with a thickness such that biquadratic coupling is stronger than bilinear coupling, unusual behaviors for the magnetoresistance were observed: (i) for the [110] case, there is a different behavior for structures based on even and odd Fibonacci generations, and, more interesting, (ii) for the [100] case, we found magnetic field ranges for which the magnetoresistance increases with magnetic field	pt_BR
dc.identifier.citation	MACHADO, L.; BEZERRA, C.G.; CORREA, M. A. ; FEITOSA, C.C.A.; PEARSON, J.; HOFFMANN, A. . Anomalous magnetoresistance in Fibonacci multilayers. Physical Review. B: Condensed Matter and Materials Physics, v. 85, p. 224416, 2012. Disponível em: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.224416. Acesso em: 02 jul. 2020. https://doi.org/10.1103/PhysRevB.85.224416.	pt_BR
dc.identifier.doi	10.1103/PhysRevB.85.224416
dc.identifier.issn	2469-9950
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29406
dc.language	en	pt_BR
dc.publisher	American Physical Society	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Fibonacci multilayers	pt_BR
dc.subject	Magnetoresistance	pt_BR
dc.title	Anomalous magnetoresistance in Fibonacci multilayers	pt_BR
dc.type	article	pt_BR