Development of electrical, magnetic, and optical novel properties by the emergence of spin and electric polarization fields

自旋和电极化场的出现开发了电、磁和光学新特性

• 批准号: 23246113
• 负责人: ITOH MITSURU
• 金额: $ 31.78万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23246113/
• 关键词: 強誘電体; 強磁性体; マルチフェロイック; 熱伝導; 量子常誘電体; 量子臨界点; 機能創発; 誘電性; 磁性; 蛍光特性; 薄膜; PLD法; 蛍光体; 強誘電性; 高圧安定相; ペロブスカイト型; K2NiF4型構造

This research has intended to develop novel oxide materials with ferroelectricity, ferromagnetism, and luminescent properties based on the emergence of the physics, chemistry, and materials processing. (1)Detailed inspections based on the theory and experimental results on the origin of the ferroelectricity in displacive-type ferroeloectrics. We could succeed in proposing a new model for quantum paraelectrics beyond the critical parameters for quantum critical limit.(2)Based on the project searching for new ferroelectric with tetrahedral structural copmpoiments, ferroelectric Bi2SiO5 was synthesized and investigated in detail. This material convinced us that even SiO4 tetrahedron can be deformed to have electric polarization. Detailed structural analysis revealed that this material belongs to a kind of ferrielectric category.(3)New multiferroiics composed of only ubiquitous elements such as O, Al, Fe could be obtained.

本研究的目的是从物理、化学和材料加工的角度出发，开发具有铁电性、铁磁性和发光性能的新型氧化物材料。（1）对位移型铁电体中铁电性的起源进行了详细的理论和实验研究。我们可以成功地提出一个新的量子顺电模型，超越量子临界极限的临界参数。（2）基于寻找新型四面体结构铁电体材料的项目，合成了Bi_2SiO_5铁电体材料，并对其进行了详细的研究。这种材料使我们相信，即使是SiO4四面体也可以变形以具有电极化。详细的结构分析表明，该材料属于铁电材料。（3）可以得到仅由普遍存在的元素O、Al、Fe组成的新的多铁性材料。

项目成果

Raman Scattering Study on the Phase Transition Dynamics of Ferroelectric Oxides, Advances in Ferroelectrics

铁电氧化物相变动力学的拉曼散射研究，铁电学进展

• 发表时间: 2012
• 作者: Hiroki Taniguchi;Hiroki Moriwake;Toshirou Yagi and Mitsuru Itoh (分担)
• 通讯作者: Toshirou Yagi and Mitsuru Itoh (分担)

伊藤・谷山研究室ホームページ

伊藤/谷山实验室主页

Electric Field Control of Magnetic Coercivity of Fe Thin Film in Fe/BaTiO_3 Heterostructures

Fe/BaTiO_3异质结构中Fe薄膜矫顽力的电场控制

• 发表时间: 2012
• 作者: Gorige Venkataiah;Yasuhiro Shirahata;Mitsuru Itoh;Tomoyasu Taniyama
• 通讯作者: Tomoyasu Taniyama

イルメナイト型MgTiO_3薄膜の蛍光特性

钛铁矿型MgTiO_3薄膜的荧光性能

• 发表时间: 2012
• 作者: 濱嵜容丞;清水荘雄;谷口博基;谷山智康;伊藤満
• 通讯作者: 伊藤満

Enhanced Piezoresponse in (Bi,Sm)FeO3 Films at a Morphotropic Phase Boundary for Piezo-MEMS Devices

压电 MEMS 器件在同形相边界处增强 (Bi,Sm)FeO3 薄膜的压电响应

• 发表时间: 2013
• 作者: Shintaro Yasui;Yoshitaka Ehara;Takahisa Shiraishi;Takao Shimizu;Hiroshi Funakubo;Mitsuru Itoh;Yasuhiko Imai;Hiroo Tajiri;Osami Sakata;and Ichiro Takeuchi
• 通讯作者: and Ichiro Takeuchi