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Influence of microstructures on exchange bias behaviors of La0.7Sr0.3MnO3/La0.33Ca0.67MnO3 bilayers |
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| Authors: | D.-W Kim T.W Noh H TanakaT Kawai |
| Affiliation: | a School of Physics and Research Center for Oxide Electronics, Seoul National University, Seoul 151-742, South Korea b Samsung Advanced Institute of Technology, P.O. Box 111, 440-600 Suwon, South Korea c Institute of Scienfitic and Industrial Research, Osaka University, 8-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan |
| Abstract: | Ferromagnetic La0.7Sr0.3MnO3 (LSMO) and antiferromagnetic La0.33Ca0.67MnO3 (LCMO) layers were grown on SrTiO3 (STO) substrates by the pulsed laser deposition technique. LSMO films had rougher surfaces and larger grain sizes than LCMO films. Fully strained bilayers, in which each layer was as thin as 10 nm, were prepared by changing their stacking sequences, i.e. LSMO/LCMO/STO and LCMO/LSMO/STO. The former had higher TC (350 K) than the latter (300 K), and exchange bias effects were only observed in the former bilayers. This revealed that microstructures could play an important role in the transport and magnetic properties of manganese oxide thin films. |
| Keywords: | 77.70.+a 79.75.+g 85.40.&minus e |
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