Search for new multiferroics in charge-ordered manganites

• Project/Area Number: 17K14101
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Iwate University
• Principal Investigator: Taniguchi Haruka 岩手大学, 理工学部, 助教 (60735877)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: マルチフェロイクス / 磁気誘電効果 / 圧力効果 / 電荷整列 / リラクサー / 電気磁気効果 / 誘電体物性

Outline of Final Research Achievements

Because charge-ordered manganite Ca(Mn,Sb)O3 exhibits a dielectric anomaly sensitive to magnetic field, Ca(Mn,Sb)O3 is hopeful as a new multiferroic material which is applicable to a memory device. In this study, for achieving a device which is active at room temperatures, we investigated a factor which enhances the dielectric anomaly temperature of Ca(Mn,Sb)O3. The chemical and physical pressure effects on the dielectric anomaly temperature indicate that the tolerance factor plays an important role on the dielectric properties in Ca(Mn,Sb)O3.

Academic Significance and Societal Importance of the Research Achievements

元素置換によって最高で170 Kもの高温において磁気誘電効果を誘起できたのみならず、その起源を探ることで今後より高機能な新物質を開拓するための方策も提案できた。従って、本研究はマルチフェロイクスの実用化を加速できたという意義を持つ。

Research Products

• [Int'l Joint Research] Universit´e Paris-Sud(フランス)
• [Int'l Joint Research] Universit´e Paris-Sud(フランス)
• [Int'l Joint Research] Universit´e Paris-Sud(France)
• [Journal Article] Electron-Doping Effect on the Magnetic-Field-Sensitive Dielectric Anomaly in CaMn1?<italic>x</italic>Sb<italic>x</italic>O3 (2019)
  • Author(s): Taniguchi Haruka、Takahashi Hidenori、Terui Akihiro、Kobayashi Satoru、Matsukawa Michiaki、Suryanarayanan Ramanathan
  • Journal Title: IEEE Transactions on Magnetics Volume: 55 Issue: 2 Pages: 1-4
  • DOI: 10.1109/tmag.2018.2868511
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Dielectric anomaly and magnetoelectric effect accompanying a charge ordering in the electron-doped manganite Ca1-xSrxMn0.85Sb0.15O3 (2018)
  • Author(s): Haruka Taniguchi, Hidenori Takahashi, Akihiro Terui, Satoru Kobayashi, Michiaki Matsukawa and Ramanathan Suryanarayanan
  • Journal Title: Journal of Physics: Conference Series Volume: 969 Pages: 012094-012094
  • DOI: 10.1088/1742-6596/969/1/012094
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 電荷整列系CaMn0.85Sb0.15O3の誘電異常への化学圧力効果 (2020)
  • Author(s): 谷口晴香, 定光健介, 小林悟, 松川倫明, R Suryanarayanan
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 電荷整列系CaMn0.85Sb0.15O3の誘電異常への物理圧力効果 (2020)
  • Author(s): 定光健介, 谷口晴香, 遠山友貴, 吉田一智, 小林悟, 松川倫明, R Suryanarayanan
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 電荷整列系CaMn0.88Sb0.12O3単結晶の誘電特性と磁気特性 (2019)
  • Author(s): 谷口晴香, 定光健介, 佐藤優香, 伊藤達博, 小林悟, 松川倫明, 山口隼平, 佐々木菜絵, 渡辺孝夫, R Suryanarayanan
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 電荷整列マンガン酸化物CaMn0.85Sb0.15O3多結晶の誘電異常とサイズ効果 (2019)
  • Author(s): 定光健介, 谷口晴香, 伊藤達博, 小林悟, 松川倫明, R Suryanarayanan
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] ペロブスカイト型マンガン酸化物CaMn1-xSbxO3の磁化反転の起源の解明 (2019)
  • Author(s): 関川曉, 石井祐太, 山本孟, 木村宏之, 谷口晴香, 松川倫明, 東正樹, 本田孝志, 大友季哉, 佐賀山基
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 電荷整列系Ca1-xSrxMn0.8Sb0.2O3の熱物性 (2019)
  • Author(s): 谷口晴香、佐藤景介、照井晶大、松川倫明
  • Organizer: 日本物理学会2019年次大会
• [Presentation] The magnetic anomaly and the thermodynamic properties of the charge-ordered system Ca1-xSrxMn1-ySbyO3 (2018)
  • Author(s): H. Taniguchi, A. Terui, S. Kobayashi, M. Matsukawa, and R. Suryanarayanan
  • Organizer: International Conference on Magnetism 2018
  • Int'l Joint Research
• [Presentation] Magnetic-field-sensitive dielectric anomaly of the electron-doped manganite CaMn1-xSbxO3 (2018)
  • Author(s): H. Taniguchi, H. Takahashi, A. Terui, S. Kobayashi, M. Matsukawa, and R. Suryanarayanan
  • Organizer: International Conference on Magnetism 2018
  • Int'l Joint Research
• [Presentation] CaMn1-xSbxO3の熱力学物性へのSb置換効果 (2018)
  • Author(s): 谷口晴香, 照井晶大, 小林悟, R. Suryanarayanan, 松川倫明
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] Dielectric anomaly and magnetoelectric effect accompanying a charge ordering in the electron-doped manganite Ca1-xSrxMn0.85Sb0.15O3 (2017)
  • Author(s): Haruka Taniguchi, Hidenori Takahashi, Akihiro Terui, Satoru Kobayashi, Michiaki Matsukawa and Ramanathan Suryanarayanan
  • Organizer: 28th International Conference on Low Temperature Physics
  • Int'l Joint Research
• [Presentation] 電荷整列マンガン酸化物CaMn1-xSbxO3の電気磁気効果に対するSb置換効果 (2017)
  • Author(s): 照井晶大, 谷口晴香, 高橋秀典, 小林悟, 松川倫明, R Suryanarayanan
  • Organizer: 日本物理学会2017年秋季大会