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Magnetic profile of Ni/Fe/Ni trilayers (Articolo in rivista)

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G.B. Fratucello, A.M. Prandini, P. Luches, S. D'Addato, A.J. Patchett and S. Nannarone (2000)
Magnetic profile of Ni/Fe/Ni trilayers
in Journal of magnetism and magnetic materials; Elsevier Science Publishers B.V., Amsterdam (Paesi Bassi)
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G.B. Fratucello, A.M. Prandini, P. Luches, S. D'Addato, A.J. Patchett and S. Nannarone (literal)

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Istituto Nazionale di Fisica della Materia (INFM) and Dipartimento di Fisica, Dell`Università di Ferrara, via Paradiso 12, 44100 Ferrara, Italy INFM and Dipartimento di Fisica dell`Università di Modena, via G. Campi 213/a, 41100 Modena, Italy (literal)

Titolo

Abstract

The magnetic structure of Ni(1 1 1)/Fe/Ni trilayer was studied by Mossbauer spectroscopy. Two kinds of samples were studied differing each other in the substrate preparation, in the evaporation method of Fe-57 and in vacuum condition. Fabrication by thermal evaporation in HV on a Ni buffer layer grown on mica and by electron beam bombardment in UHV on cleaned Ni(1 1 1) single crystal was used. The Ni substrate morphology was characterised by STM. Similar magnetic structure was found for the two systems, consisting of two well-defined features of the hyperfine field occurring at high value (similar to 28 T) and low one (<8 T). The high-field component was assigned to Fe atoms close to Fe-Ni interface with high-spin ferromagnetic state, and the low-field component to Fe atoms inside the Fe layer with low-spin antiferromagnetic state. (literal)

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