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Magnetostrictive properties of amorphous SmCo thin films with imprinted anisotropy
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 89, no 13, 134414-1-134414-6 p., 134414Article in journal (Refereed) Published
Abstract [en]

We examine the magnetostriction in amorphous SmCo thin films with a composition in the range 4-27 at.% Sm. The magnetostriction increases significantly with increasing Sm content but is small compared to terbium-based ferromagnetic compounds, despite the large imprinted anisotropy. The magnetostriction and anisotropy both increase approximately linearly as the temperature is reduced. The magnetoelastic energy is found to be far smaller than the anisotropy energy so the magnetoelastic atomic displacements during growth cannot be the origin of the imprinted anisotropy. The anisotropy is only slightly altered by the application of large tensile stresses, indicating that the local strain fields involved in magnetostriction are not equivalent to the global strain produced by mechanical bending.

Place, publisher, year, edition, pages
2014. Vol. 89, no 13, 134414-1-134414-6 p., 134414
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Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-224725DOI: 10.1103/PhysRevB.89.134414ISI: 000334593700002OAI: oai:DiVA.org:uu-224725DiVA: diva2:719127
Available from: 2014-05-23 Created: 2014-05-19 Last updated: 2017-12-05Bibliographically approved

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Magnus, FridrikMoubah, RedaKapaklis, VassiliosAndersson, GabriellaHjörvarsson, Björgvin

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