Dielectric Behavior of (1-x)LaAlO3–xSrTiO3 Solid Solution System at Microwave Frequencies
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概要
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The (1-x)LaAlO3–xSrTiO3 solid solution system with the perovskite structure was synthesized and its dielectric behavior was investigated. The lattice parameter of (1-x)LaAlO3–xSrTiO3 increases with increasing the fraction of SrTiO3 in the system. 0.45LaAlO3–0.55SrTiO3 shows a dielectric constant ε of 34, a temperature coefficient of resonant frequency τf of -8 ppmK-1 and a dielectric loss Q of 6900, which satisfy the suggested requirements for applications to mobile communications devices. The annihilation of the ferroelectric mode of SrTiO3 corresponds to the drastic decrease of ε and τf of SrTiO3 to those of 0.25LaAlO3–0.75SrTiO3.
- 1998-10-15
著者
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Itoh Mitsuru
Materials & Structures Laboratory Tit
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Shan Yue
Department Of Applied Chemistry Faculty Of Engineering Utsunomiya University
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Kitamura Toshiki
Ins Center Network Center Recruit Company
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Inaguma Yoshiyuki
Materials &structures Laboratory Tit
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Itoh Mitsuru
Materials and Structure Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan
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Nakamura Pai-hsuan
Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 2753 Ishii-cho, Utsunomiya 321-8585, Japan
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Shan Yue
Department of Applied Chemistry, Faculty of Engineering, Utsunomiya University, 2753 Ishii-cho, Utsunomiya 321-8585, Japan
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Inaguma Yoshiyuki
Materials and Structure Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan
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