Kruk, R. ; Ghafari, M. ; Hahn, H. ; Michels, D. ; Birringer, R. ; Krill, C. ; Kmiec, R. ; Marszalek, M. (2006)
Grain-size-dependent magnetic properties of nanocrystalline Gd.
In: Physical Review B, 73 (5)
doi: 10.1103/PhysRevB.73.054420
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Microscopic magnetic and electronic properties of nanocrystalline Gd were studied by 155Gd Mössbauer spectroscopy. This technique made it possible to distinguish the microstructure-dependent properties of Gd located in nanocrystal interiors from the properties of Gd in the grain boundaries. For the grain interiors a correlation between the induced magnetic anisotropy and the grain size was observed; this anisotropy can be attributed to the internal pressure resulting from the interface stress of the grain boundaries. The magnetic and electronic structure of the atoms in the grain boundaries differs distinctively from that in the grain interiors: the Gd magnetic moments at the grain boundaries are randomly oriented with respect to the local crystallographic axes, and the density of conduction s electrons is reduced, perhaps as a result of a lower number of Gd nearest neighbors.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2006 |
| Autor(en): | Kruk, R. ; Ghafari, M. ; Hahn, H. ; Michels, D. ; Birringer, R. ; Krill, C. ; Kmiec, R. ; Marszalek, M. |
| Art des Eintrags: | Bibliographie |
| Titel: | Grain-size-dependent magnetic properties of nanocrystalline Gd |
| Sprache: | Englisch |
| Publikationsjahr: | 13 Februar 2006 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 73 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1103/PhysRevB.73.054420 |
| Kurzbeschreibung (Abstract): | Microscopic magnetic and electronic properties of nanocrystalline Gd were studied by 155Gd Mössbauer spectroscopy. This technique made it possible to distinguish the microstructure-dependent properties of Gd located in nanocrystal interiors from the properties of Gd in the grain boundaries. For the grain interiors a correlation between the induced magnetic anisotropy and the grain size was observed; this anisotropy can be attributed to the internal pressure resulting from the interface stress of the grain boundaries. The magnetic and electronic structure of the atoms in the grain boundaries differs distinctively from that in the grain interiors: the Gd magnetic moments at the grain boundaries are randomly oriented with respect to the local crystallographic axes, and the density of conduction s electrons is reduced, perhaps as a result of a lower number of Gd nearest neighbors. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 11 Feb 2013 09:06 |
| Letzte Änderung: | 05 Mär 2013 10:05 |
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