2010 Fiscal Year Final Research Report
Crystal Growth of the Relaxor typed Ferroelectrics single crystal and Observation of the multi-ferroelectric domains
| Project/Area Number |
20560633
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Gifu National College of Technology |
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Principal Investigator |
FUJITA Kazuhiko Gifu National College of Technology, 電子制御工学科, 教授 (40249793)
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| Co-Investigator(Kenkyū-buntansha) |
YASUDA Naohiko 岐阜大学, 大学院・工学研究科, 教授 (90021625)
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| Project Period (FY) |
2008 – 2010
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| Keywords | リラクサー / 強誘電体 / 圧電体 / ドメイン構造 |
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| Research Abstract |
Lead-based relaxor ferroelectric single crystal solid solutions, such as a Pb(Zn_<1/3>Nb_<2/3>)O_3 -PbTiO_3 binary system, with compositions near the morphotropic phase boundary(MPB) have attracted considerable attention for several applications in higher-performance actuators, and ultrasonic devices, making use of their superior piezoelectric properties. From the view of the environmental protection, We have selected the lead-free ferroelectric sodium bismuth titanate (Na_<1/2>Bi_<1/2>)TiO_3-BaTiO_3 (NBT-BT) which has very excellent electromechanical properties, and trid to grow the solid solution single crystals of NBT-BT by the Bridgman methods. The domain observation of NBT-BT by using the polarizing microscope, nano-domain observation and piezoresponse in nanoscale regions by using piezoresponse force microscopy (PFM), measurement of dielectric permittivity, P-E hysteresis measurement with improved Sawyer-Tower circuit, were extensively investigated for NBT-BT relaxor ferroelectrics.
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[Journal Article] Domain switching in nanometer scale in Bismuth-based relaxor solid solution2011
Author(s)
Naohiko Yasuda, Natsumi Takahashi, NurHidayah, Hidehiro Ohwa, Osamu Sakurada, Yoshihirto Tachi, Kazuhiko Fujita, Yohachi Yamashita, Makoto Iwata, Hikaru Terauchi, Yoshihiro Ishibashi
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Journal Title
Journal of Physics : Conference Series (in press)
Peer Reviewed
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