Sökning: onr:"swepub:oai:DiVA.org:uu-119892" >
Magnetic anisotropy...
Magnetic anisotropy and evolution of ground-state domain structures in bcc Fe81Ni19/Co(001) superlattices
-
- Brucas, R. (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Uppsala University,Materialfysik
-
- Hafermann, H. (författare)
- Institute of Theoretical Physics, University of Hamburg, 20355 Hamburg, Germany
-
- Soroka, I. L. (författare)
- Uppsala universitet,Institutionen för materialkemi,Uppsala Universitet,Materialkemi
-
visa fler...
-
- Iusan, Diana (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Uppsala Universitet,Fysik och Astronomi
-
- Sanyal, B. (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Uppsala Universitet
-
- Katsnelson, M. I. (författare)
- Institute for Molecules and Materials, Radboud University, 6525 ED Nijmegen, The Netherlands
-
- Eriksson, Olle (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Department of Physics and Materials Science, Uppsala University
-
- Hjörvarsson, Björgvin (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Uppsala Universitet,Fysik och Astronomi
-
visa färre...
-
(creator_code:org_t)
- The American Physical Society, 2008
- 2008
- Engelska.
-
Ingår i: Physical Review B. Condensed Matter and Materials Physics. - : The American Physical Society. - 1098-0121 .- 1550-235X. ; 78:2, s. 024421-
- Relaterad länk:
-
http://link.aps.org/...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- The magnetic anisotropy and evolution of striped magnetic domain structures in bcc Fe81Ni19/Co(001) superlattices with the total thickness ranging from 85 to 1370 nm has been studied by magneto-optical Kerr effect and magnetic force microscopy. At a thickness of about 85 nm [25 bilayers (BL)] the domains appear as stripe domains, typical for perpendicular anisotropy films, with the weak cubic anisotropy of the in-plane magnetization component stabilizing the stripe direction. The magnetic domain period strongly depends on the thickness of the superlattice. As the thickness increases, the equilibrium magnetization orients at oblique angles with respect to the film plane and continuously varies with the thickness from in-plane to out-of-plane. We first apply a simple phenomenological model which correctly predicts the transition from in-plane to out-of-plane magnetization as well as increasing domain period and saturation field with increasing BL number. The results indicate the presence of partial flux-closure domains at the film surface with the tilt angle continuously varying with the superlattice thickness. By solving a linearized Landau–Lifshitz equation together with Maxwell’s equations in magnetostatic approximation for samples consisting of up to 1000 individual layers, we calculate the spin-wave dispersion and determine the stability conditions for the saturated ferromagnetic state. From these results the dependence of the saturation field on the number of layers is inferred and agrees well with the experiment. The uniaxial bulk anisotropy is attributed to distortions along the c axis and the results further show evidence for the presence of an easy-plane interface anisotropy in these samples.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Domain effects
- magnetization curves
- and hysteresis
- Magnetic properties of thin films
- surfaces
- and interfaces
- Magnetic properties of nanostructures
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas