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  • Eyrich, C., et al. (author)
  • Effects of substitution on the exchange stiffness and magnetization of Co films
  • 2014
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 90:23, s. 235408-
  • Journal article (peer-reviewed)abstract
    • 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.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Zhu, X. (1)
Ahlberg, Martina (1)
Zamani, Atieh (1)
Jönsson, Petra E. (1)
Karis, Olof (1)
Arora, M (1)
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Harrison, D (1)
Heinrich, B (1)
Eyrich, C. (1)
Huttema, W. (1)
Rashidi, F. (1)
Broun, D. (1)
Mryasov, O. (1)
From, M. (1)
Girt, E. (1)
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University
Uppsala University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2014 (1)

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