Kamali, S. ; Kilmametov, A. ; Ghafari, M. ; Itou, M. ; Hahn, H. ; Sakurai, Y. (2015)
Controlling spin polarized band-structure by variation of vacancy intensity in nanostructures.
In: Journal of Physics: Condensed Matter, 27 (7)
doi: 10.1088/0953-8984/27/7/075304
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this study, the magnetic properties of FeAl alloys with different grain sizes produced by high-pressure torsion were probed by means of magnetic Compton scattering. The measurements were performed at 300 and 10 K. Magnetic Compton profiles of nanocrystalline (35 nm) and ultrafine-grained (160 nm) FeAl alloys were analyzed in terms of the integral area, the width, and the distinctive dip intensity at low momenta. The changes in total magnetic moment and the strength of spin-polarization of itinerant electrons are assumed to be caused by vacancies induced during the preparation of the samples. Despite local disordering due to interfacial regions and deviations in perfect stoichiometry for B2 structure, the effect of vacancies is considered as the major magnetic state contributor.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Kamali, S. ; Kilmametov, A. ; Ghafari, M. ; Itou, M. ; Hahn, H. ; Sakurai, Y. |
| Art des Eintrags: | Bibliographie |
| Titel: | Controlling spin polarized band-structure by variation of vacancy intensity in nanostructures |
| Sprache: | Englisch |
| Publikationsjahr: | 25 Februar 2015 |
| Verlag: | IOP Publishing Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Physics: Condensed Matter |
| Jahrgang/Volume einer Zeitschrift: | 27 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1088/0953-8984/27/7/075304 |
| Kurzbeschreibung (Abstract): | In this study, the magnetic properties of FeAl alloys with different grain sizes produced by high-pressure torsion were probed by means of magnetic Compton scattering. The measurements were performed at 300 and 10 K. Magnetic Compton profiles of nanocrystalline (35 nm) and ultrafine-grained (160 nm) FeAl alloys were analyzed in terms of the integral area, the width, and the distinctive dip intensity at low momenta. The changes in total magnetic moment and the strength of spin-polarization of itinerant electrons are assumed to be caused by vacancies induced during the preparation of the samples. Despite local disordering due to interfacial regions and deviations in perfect stoichiometry for B2 structure, the effect of vacancies is considered as the major magnetic state contributor. |
| Freie Schlagworte: | FeAl alloys, high-pressure torsion, magnetic compton scattering, magnetism, nano-structures |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien |
| Hinterlegungsdatum: | 10 Feb 2016 09:24 |
| Letzte Änderung: | 26 Sep 2018 12:47 |
| PPN: | |
| Sponsoren: | S Kamali acknowledges the Japan Society for the Promotion of Science for financial support., The magnetic Compton scattering experiment was performed with the approval of the Japan Synchrotron Radiation Research Institute (Proposal No.: 2014A1489). |
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