| Project/Area Number |
20340078
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
MORI Shigeo Osaka Prefecture University, 工学研究科, 教授 (20251613)
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| Co-Investigator(Renkei-kenkyūsha) |
IKEDA Naoshi 岡山大学, 理学部, 教授 (00222894)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2009: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2008: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Keywords | 磁性誘電体 / リラクサー / 電子顕微鏡 / ビスマスフェライト / BaTiO3 / ドメイン構造 / マルチフェロイック物質 / 誘電体 / 磁性体 / 透過型電子顕微鏡 / ローレンツ電子顕微鏡 / 階層的ドメイン構造 / 磁気誘電効果 / 電子誘電体 / 不均質構造 / リラクサー誘電体 / 強誘電体 / 電気磁気効果 |
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| Research Abstract |
We have investigated magnetic and dielectric properties and related microstructures in (1-x)BiFeO_3-xBaTiO_3 solid solution using a transmission electron microscopy (TEM), in combination with conventional magnetic and dielectric measurements. Nano-sized domain structures in the cubic phase of (1-x)BiFeO_3-xBaTiO_3 with 0.33<x<0.60 were found. From high-resolution TEM observation, it is revealed that the cubic phase in 0.33<x<0.60 is characterized as nano-scaled coexisting state of the polar rhombohedral structure and the non-polar cubic one, which should be regarded as the psudo-cubic phase. On the other hand, both P-E hysteresis measurements and the TEM experiments revealed that the cubic phase without any distortion due to the coexisting state appears in the x=0.60 compound at room temperature. Our experimental findings suggested that (1-x)BiFeO_3-xBaTiO_3 is a good candidate materials showing a gigantic magnetoelectric effect as a magnetoelectric relaxor.
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Report
(4 results)
Research Products
(89 results)
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[Journal Article] Stoichiometric Study of the Dielectric and Magnetic Properties in Charge Frustrated System LuFe_2O_42009
Author(s)
T. Michiuchi, Y. Yokota, T. Komatsu, H. Hayakawa, T. Kuroda, D. Maeda, Y.Matsuo, S.Mori, K.Yoshii, N. Hanasaki, T. Kambe, N.Ikeda
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Journal Title
Ferroelectrics 378
Pages: 175-175
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[Presentation] Polar Nanodomain and Magneto capacitance Effect in Hexagonal Yb(Fe,Ti)O_32010
Author(s)
T. Hoshiyama, Y. Matsuo, S. Mori, K. Yoshii, Y. Michiue, T. Kambe, N. Iked, F. Brown, N. Kimizuka
Organizer
The 10th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity
Place of Presentation
Tokyo, Japan
Year and Date
2010-06-23
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