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Effects of substitution on the exchange stiffness and magnetization of Co films
- Eyrich, C. (author)
-
- Zamani, Atieh (author)
- Uppsala universitet,Materialfysik
- Huttema, W. (author)
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- Arora, M. (author)
- Harrison, D. (author)
- Rashidi, F. (author)
- Broun, D. (author)
- Heinrich, B. (author)
- Mryasov, O. (author)
- From, M. (author)
- Zhu, X. (author)
- Girt, E. (author)
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- (creator_code:org_t)
- 2014
- 2014
- English.
- In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 90:23, s. 235408-
- Journal article (peer-reviewed)
Abstract
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- An antiferromagnetically coupled FM/NM/FM (FM = ferromagnet, NM = normal metal) trilayer structure responds to an external magnetic field by the formation of a magnetic-moment spring within the FM layers. We show that the exchange stiffness (A ex) of an FM layer can be determined by fitting the field-dependent magnetization, M(H), of the FM/NM/FM trilayer to a micromagnetic model. Using this method, we have measured the exchange stiffness of thin-film Co alloyed with Cr, Fe, Ni, Pd, Pt, and Ru. The results show that the rate at which a substituent element reduces the exchange stiffness is not directly related to its effect on the magnetization of the alloy. The observed trends have been understood by material-specific modeling based on density functional theory within the local density approximation. The stiffness measurements are in agreement with Brillouin light scattering carried out on thicker Co films.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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- ref (subject category)
- art (subject category)
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- Eyrich, C.
- Zamani, Atieh
- Huttema, W.
- Arora, M.
- Harrison, D.
- Rashidi, F.
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- Broun, D.
- Heinrich, B.
- Mryasov, O.
- Ahlberg, Martina
- Karis, Olof
- Jönsson, Petra E ...
- From, M.
- Zhu, X.
- Girt, E.
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- NATURAL SCIENCES
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