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Magnetic properties...
Magnetic properties of Fe/Co(001) superlattices from first-principles theory
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- Bergman, Anders (författare)
- Uppsala universitet,Fysiska institutionen,Uppsala University
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- Burkert, Till, 1972- (författare)
- Linköpings universitet,Tekniska högskolan,Teoretisk Fysik
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- Sanyal, Biplab (författare)
- Uppsala universitet,Fysiska institutionen,Uppsala University
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- Frota-Pessoa, Sonia (författare)
- Universidade de Saõ Paulo
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- Nordström, Lars (författare)
- Uppsala universitet,Fysiska institutionen,Uppsala University
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- Ruban, Andrei V. (författare)
- KTH,Tillämpad materialfysik,Royal Institute of Technology
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- Simak, Sergey, 1967- (författare)
- Linköpings universitet,Tekniska högskolan,Teoretisk Fysik
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- Eriksson, Olle (författare)
- Uppsala universitet,Fysiska institutionen,Uppsala University
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(creator_code:org_t)
- American Physical Society, 2006
- 2006
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - : American Physical Society. - 1098-0121 .- 1550-235X. ; 74:17
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The magnetic properties of Fe/Co(001) superlattices have been studied using fully-relativistic first-principles theories. The average magnetic moment shows a behavior similar to bulk Fe-Co alloys, i.e., an enhanced magnetic moment for low Co concentrations, as described by the Slater-Pauling curve. The maximum of the magnetization curve, however, is lowered and shifted towards the Fe-rich compositions. The increased average magnetic moment for the Fe-rich superlattices, compared to bulk Fe, is due to an enhancement of the Fe spin moment close to the Fe-Co interface. The orbital moments were found to be of the same size as in bulk. The effect of interface roughness on the magnetic properties was investigated, and it was found that-despite local fluctuations due to the varying coordination-the average magnetic moment is only slightly affected. From a mapping of first-principles interactions onto the screened generalized perturbation method, we calculate the temperatures for when Fe/Co superlattices break up into an alloy configuration. Furthermore, the tetragonal distortion of the superlattice structure was found to only have a minor effect on the magnetic moments. Also, the calculated easy axis of magnetization is in the film plane for all compositions studied. It lies along the [100] direction for Fe-rich superlattices and along the [110] direction for Co-rich compositions. The transition of the easy axis occurs around a Co concentration of 50%.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- brillouin-zone integrations
- bcc co/fe superlattices
- metallic multilayers
- epitaxial-growth
- 3d impurities
- co
- alloys
- ni
- anisotropy
- fe
- Physics
- NATURAL SCIENCES
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- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Bergman, Anders
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Burkert, Till, 1 ...
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Sanyal, Biplab
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Frota-Pessoa, So ...
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Nordström, Lars
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Ruban, Andrei V.
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visa fler...
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Simak, Sergey, 1 ...
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Eriksson, Olle
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Kungliga Tekniska Högskolan
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Uppsala universitet
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