SHG studies of multi-ferroelectricity of hexagonal rare-earth ferrite thin films

六方稀土铁氧体薄膜多铁电性的二次谐波研究

• 批准号: 23540379
• 负责人: UESU Yoshiaki
• 金额: $ 3.33万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540379/
• 关键词: 強誘電体; マルチフェロ物質; 強弾性体; SHG顕微鏡; 薄膜; 希土類フェライト; 錫ペロブスカイト酸化物; チタン酸カルシウム; ドメイン; ドメイン境界; 国際情報交流、フランス; 国際情報交流、イギリス; 国際情報交流、アメリカ

Under this research project, the following three results were attained. (1)The coexistence of ferroelectricity and magnetic order in epitaxial hexagonal YbFeO3 thin films fabricated by the PLD method was experimentally found for the first time (published in J.Phys.Soc.Jpn. 2012) (2) Sn doped PbTiO3 thin films were successfully synthesized using a newly developed PLD method with three different ceramic targets. It was revealed that the films is a mixed state of SnTiO3, PbSnO3, and PbTiO3 and ferroelectrics with Tc of 277C. (3) The polar nature of twin boundaries (TBs) of inherently non-polar ferroelastic CaTiO3 was examined by the confocal SHG microscope. Three-dimensional SHG images confirmed that both crystallographically prominent TB and non-prominent TB are SHG active and consequently polar. The point group symmetries of the TBs and directions of the electric polarization are determined from the anisotropy of SHG intensities (published in Phys.Rev.B 2014).

在本研究项目下，取得了以下三方面的成果。(1)首次在用PLD方法制备的YbFeO_3外延薄膜中发现了铁电性和磁序性共存的现象(发表在《物理学报》上)。2012)(2)用三种不同的陶瓷靶材，用一种新的PLD方法成功地制备了掺锡钛酸铅薄膜。结果表明，该薄膜为SnTiO_3、PbSnO_3、PbTiO_3和铁电体的混合态，T_c为277C。(3)用共聚焦倍频显微镜研究了本征非极性铁弹性CaTiO_3的孪晶界(TBS)的极性性质。三维倍频图像证实，结晶学上突出的结核和非突出的结核都是倍频活性的，因此是极性的。TBS的点群对称性和电极化方向是由倍频强度的各向异性确定的(发表在Phys.Rev.B 2014上)。

项目成果

ＳＨＧを利用した分域構造解析

使用 SHG 进行域结构分析

• 作者: M. Nishino;C. Enachescu;S. Miyashita;K. Boukheddaden;F. Varret;K.Munakata;Yudai Izumi;上江洲由晃
• 通讯作者: 上江洲由晃

Sn-substituted perovskite oxide films – newly featured ferroelectrics -

Sn取代钙钛矿氧化物薄膜——新特色铁电体——

• 作者: Yokoya;T;Yoshida;R;Utsumi;Y;Tsubota;K;Okazaki;H;Wakita;T ;Mizuguchi;Y;Takano;Y;Muro;T;Kato;Y;Kumigashira;H;Oshima;M;Harima;H;Aiura;Y ;Sato;H;Ino;A;Namatame;H;Taniguchi;M;Hirai;M;Muraoka;Y;上江洲由晃
• 通讯作者: 上江洲由晃

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Identification of LiNbO3, LiNb3O8 and Li3NbO4 phases in thin films synthesized with different deposition techniques by means of XRD and Raman spectroscopy

• DOI: 10.1088/0953-8984/25/20/205901
• 发表时间: 2013-05-22
• 期刊: JOURNAL OF PHYSICS-CONDENSED MATTER
• 影响因子: 2.7
• 作者: Bartasyte, Ausrine;Plausinaitiene, Valentina;Gleize, Jerome
• 通讯作者: Gleize, Jerome

Polar nature of twin boundaries of inherently non-polar ferroelastic CaTiO3 evidenced by SHG microscope

SHG 显微镜证明了固有非极性铁弹性 CaTiO3 孪晶界的极性性质

• 作者: 西野信也;藤原毅夫;山崎久嗣;山本智;山元進;星健夫;Tetsuro Ueno;上江洲由晃
• 通讯作者: 上江洲由晃