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Exchange stiffness in thin film Co alloys
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2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 111, no 7, p. 07C919-Article in journal (Refereed) Published
Abstract [en]

The exchange stiffness (A(ex)) is one of the key parameters controlling magnetization reversal in magnetic materials. We used a method based on the spin spiral formation in two ferromagnetic films antiferromagnetically coupled across a non-magnetic spacer layer and Brillouin scattering to measure A(ex) for a series of Co1-delta X delta (X=Cr, Ni, Ru, Pd, Pt) thin film alloys. The results show that A(ex) of Co alloys does not necessarily scale with M-s; A(ex) approximately decreases at the rate of 1.1%, 1.5%, 2.1%, 3.5%, and 5.6%, while M-s decreases at the rate of 1.1%, 0.5%, 1.1%, 3.7%, and 2.5% per addition of 1 at% of Pt, Ni, Pd, Cr, and Ru, respectively.

Place, publisher, year, edition, pages
2012. Vol. 111, no 7, p. 07C919-
National Category
Physical Sciences
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URN: urn:nbn:se:uu:diva-175853DOI: 10.1063/1.3679433ISI: 000303282401109OAI: oai:DiVA.org:uu-175853DiVA: diva2:533524
Available from: 2012-06-14 Created: 2012-06-13 Last updated: 2017-12-07Bibliographically approved

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Karis, Olof

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