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), pp. 054420-1-054420-6. American Physical Society, ISSN 1098-0121,
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2006 |
| Creators: | Kruk, R. ; Ghafari, M. ; Hahn, H. ; Michels, D. ; Birringer, R. ; Krill, C. ; Kmiec, R. ; Marszalek, M. |
| Title: | Grain-size-dependent magnetic properties of nanocrystalline Gd |
| Language: | English |
| 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. |
| Journal or Publication Title: | Physical Review B |
| Journal Volume: | 73 |
| Issue Number: | 5 |
| Publisher: | American Physical Society |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Joint Research Laboratory Nanomaterials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 11 Feb 2013 09:06 |
| URL / URN: | http://dx.doi.org/10.1103/PhysRevB.73.054420 |
| Identification Number: | doi:10.1103/PhysRevB.73.054420 |
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