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Magnetic ordering in a [Fe/Co](35) BCC film studied by nuclear resonant reflectometry
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
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2007 (English)In: Journal of Experimental and Theoretical Physics, ISSN 1063-7761, E-ISSN 1090-6509, Vol. 104, no 4, 577-585 p.Article in journal (Refereed) Published
Abstract [en]

An analysis of the angular dependences of nuclear resonant reflectivity time spectra for different models of magnetic ordering in films reveals an ambiguity in the magnetization direction determined from spectra measured at one orientation of the sample. This analysis explains features in the spectra of the nuclear resonant reflectivity from a MgO/[Fe(6 ML)/Co(3 ML)]35/V (1 nm) film measured before and after sample rotation by 90° about the normal to the surface. It is shown that the spectrum measured only at one orientation of the sample determines only the effective azimuth angle of magnetization γeff. This does not exclude the occurrence of a domain structure, while the angle γeff does not correspond to the true direction of the preferred orientation of magnetization. The results of measurements at two orientations of the sample can be satisfactorily matched using a model that considers a coherent mixture of states with magnetization directed along the 〈110〉 axis (77%) and with a chaotic orientation of the magnetic hyperfine field B hf in the film plane for the other nuclei.

Place, publisher, year, edition, pages
2007. Vol. 104, no 4, 577-585 p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-10955DOI: 10.1134/S1063776107040085ISI: 000246525000008OAI: oai:DiVA.org:uu-10955DiVA: diva2:38723
Available from: 2007-05-07 Created: 2007-05-07 Last updated: 2017-12-11Bibliographically approved

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Lindgren, BengtHäggström, Lennart

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