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Magnetic anisotropy...
Magnetic anisotropy in permalloy : hidden quantum mechanical features
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- Rodrigues, Debora C. M. (author)
- Uppsala universitet,Materialteori,Faculdade de Fisica, Universidade Federal do Para
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- B Klautau, Angela (author)
- Faculdade de Fisica, Universidade Federal do Para
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- Edström, Alexander, 1988- (author)
- Uppsala universitet,Materialteori
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- Rusz, Jan, 1979- (author)
- Uppsala universitet,Materialteori
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- Nordström, Lars (author)
- Uppsala universitet,Materialteori
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- Pereiro, Manuel (author)
- Uppsala universitet,Materialteori
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- Hjörvarsson, Björgvin (author)
- Uppsala universitet,Materialfysik
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- Eriksson, Olle, 1960- (author)
- Uppsala universitet,Materialteori
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: Physical Review B. - 2469-9950 .- 2469-9969. ; 97:22
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- By means of relativistic, first principles calculations, we investigate the microscopic origin of the vanishingly low magnetic anisotropy of Permalloy, here proposed to be intrinsically related to the local symmetries of the alloy. It is shown that the local magnetic anisotropy of individual atoms in Permalloy can be several orders of magnitude larger than that of the bulk sample and 5–10 times larger than that of elemental Fe or Ni. We furthermore show that locally there are several easy axis directions that are favored, depending on local composition. The results are discussed in the context of perturbation theory, applying the relation between magnetic anisotropy and orbital moment. Permalloy keeps its pronounced soft ferromagnetic nature due to the exchange energy to be larger than the magnetocrystalline anisotropy. Our results shine light on the magnetic anisotropy of permalloy and of magnetic materials in general, and in addition enhance the understanding of pump-probe measurements and ultrafast magnetization dynamics.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Permalloy
- Orbital Anisotropy
- Anisotropy Energy
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Rodrigues, Debor ...
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B Klautau, Angel ...
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Edström, Alexand ...
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Rusz, Jan, 1979-
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Nordström, Lars
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Pereiro, Manuel
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show more...
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Hjörvarsson, Bjö ...
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Eriksson, Olle, ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Physical Review ...
- By the university
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Uppsala University