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Metastable noncollinear canted states from a phenomenological model of a symmetric ferromagnetic film
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 5, 054440- p.Article in journal (Refereed) Published
Abstract [en]

In the present work we developed a theoretical method to find the noncollinear canted magnetic states of ferromagnetic film whose magnetic properties are treated within a simple phenomenological model that takes into account the discrete location of atomic layers. We apply this method to the description of stable and uniform in the film plane magnetic configurations of symmetric ferromagnetic film with equal anisotropy constants at both sides of a film. We demonstrated that besides the ground noncollinear canted state caused by the competition between the energies of surface and bulk anisotropy this film also exhibits metastable noncollinear canted states that are not necessarily caused by the competition between these energies. They represent various kinds of excited Bloch wall-like states with a wall parallel to the film plane. The generalization of the method developed to the case of explicit account of dipole interaction between the nearest-neighbor layers is presented. We considered the fcc and bcc films with (001) surface and demonstrated that novel metastable states discovered in the present work are not the artifact of a simple model of a film used. To prove this statement we demonstrate that these states exist when the dipole interaction between the nearest-neighbor layers is explicitly taken into account.

Place, publisher, year, edition, pages
2010. Vol. 81, no 5, 054440- p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-137121DOI: 10.1103/PhysRevB.81.054440ISI: 000274998000090OAI: oai:DiVA.org:uu-137121DiVA: diva2:377882
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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Eriksson, OlleSkorodumova, Natalia V.

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