Magnetization study of nanograined pure and Mn-doped ZnO films: Formation of a ferromagnetic grain-boundary foam
In order to elucidate room-temperature (RT) ferromagnetism (FM) in ZnO, we have analyzed a multitude of experimental publications with respect to the ratio of grain-boundary (GB) area to grain volume. FM only appears if this ratio exceeds a certain threshold value s{sub th}. Based on these important...
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| Veröffentlicht in: | Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2009-05, Vol.79 (20), Article 205206 |
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| container_title | Physical review. B, Condensed matter and materials physics |
| container_volume | 79 |
| creator | Straumal, Boris B. Mazilkin, Andrei A. Protasova, Svetlana G. Myatiev, Ata A. Straumal, Petr B. Schütz, Gisela van Aken, Peter A. Goering, Eberhard Baretzky, Brigitte |
| description | In order to elucidate room-temperature (RT) ferromagnetism (FM) in ZnO, we have analyzed a multitude of experimental publications with respect to the ratio of grain-boundary (GB) area to grain volume. FM only appears if this ratio exceeds a certain threshold value s{sub th}. Based on these important results nanograined pure and Mn-doped ZnO films have been prepared, which reveal reproducible RT FM and magnetization proportional to the film thickness, even for pure ZnO films. Our findings strongly suggest that grain boundaries and related vacancies are the intrinsic origin for RT ferromagnetism. |
| doi_str_mv | 10.1103/PhysRevB.79.205206 |
| format | Article |
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| ispartof | Physical review. B, Condensed matter and materials physics, 2009-05, Vol.79 (20), Article 205206 |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CRYSTALS DOPED MATERIALS FERROMAGNETIC MATERIALS FERROMAGNETISM GRAIN BOUNDARIES MAGNETIZATION MANGANESE MANGANESE ADDITIONS NANOSTRUCTURES TEMPERATURE RANGE 0273-0400 K THICKNESS VACANCIES ZINC OXIDES |
| title | Magnetization study of nanograined pure and Mn-doped ZnO films: Formation of a ferromagnetic grain-boundary foam |
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