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Room-temperature ferromagnetic Mn-alloyed ZnO films obtained by pulsed laser deposition |
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| Authors: | M Diaconu H Schmidt H Hochmuth M Lorenz G Benndorf D Spemann A Setzer P Esquinazi A Pöppl H von Wenckstern K-W Nielsen R Gross H Schmid W Mader G Wagner M Grundmann |
| Institution: | 1. Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften, Universität Leipzig, Linnéstraße 5, 04103 Leipzig, Germany;2. Walther-Meißner-Institut für Tieftemperaturforschung, Bayerische Akademie der Wissenschaften, Walther-Meißner-Str. 8, 85748 Garching, Germany;3. Institut für Anorganische Chemie, Rheinische Friedrich-Wilhelm Universität Bonn, Römerstr. 164, 53117 Bonn, Germany;4. Universität Leipzig, Institut für Mineralogie, Kristallographie und Materialwissenschaft, Scharnhorststrasse 20, 04275 Leipzig, Germany |
| Abstract: | Ferromagnetic, semi-insulating Mn-alloyed ZnO films with a Curie temperature above 375 K have been grown by pulsed laser deposition on c-plane sapphire substrates. Antiferromagnetic coupling is revealed by temperature-dependent magnetization measurements. The antiferromagnetic coupling would be compatible with the observed weak ferromagnetism by assuming that the magnetic moments order antiferromagnetically but nonparallel (canted). We find a clear correlation between coercivity and mosaicity of the ferromagnetic Mn-alloyed ZnO films and explain it on the basis of a coercivity mechanism known from soft magnetic materials. |
| Keywords: | 71 55 Gs 85 75 -d" target="_blank">gif" overflow="scroll"> |
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