Epitaxial Growth of La0.7Ba0.3MnO3 Thin Films on SrTiO3 and LaAlO3 Substrates by Metal-Organic Deposition
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概要
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La0.7Ba0.3MnO3 (LBMO) thin films were successfully prepared on SrTiO3 (STO) and LaAlO3 (LAO) single-crystal substrates by metal-organic deposition (MOD). The microstructure and the crystallinity of the LBMO films were examined in detail by high-resolution transmission electron microscopy and electron diffraction. The lattice mismatch between LBMO and STO is small as $-0.1$%; thus, the LBMO films were found to be epitaxially well grown. However, on the LAO substrate, which has a lattice mismatch of ${\sim}{-}3.2$% with LBMO, the films exhibited interfacial misfit dislocations along the interface. For an IR sensor application, we calculated the temperature coefficient of resistance (TCR) from the $R(T)$ measurements. The films grown on STO substrates exhibited a TCR of approximately 5%/K at 306 K compared with 7%/K at 253 K exhibited by the films grown on LAO substrates.
- 2007-04-30
著者
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MANABE Takaaki
National Institute of Advanced Industrial Science and Technology
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DAOUDI Kais
National Institute of Advanced Industrial Science and Technology (AIST)
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YAMAGUCHI Iwao
National Institute of Advanced Industrial Science and Technology (AIST)
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Nakajima Tomohiko
National Inst. Advanced Industrial Sci. And Technol. Ibaraki Jpn
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Tsuchiya Tetsuo
National Inst. Advanced Industrial Sci. And Technol. Ibaraki Jpn
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Kumagai Toshiya
National Inst. Advanced Industrial Sci. And Technol. (aist) Ibaraki Jpn
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Nakajima Tomohiko
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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Manabe Takaaki
National Institute of Advance Industrial Science and Technology (AIST)
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Kumagai Toshiya
National Chemical Laboratory for Industry
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