Elucidation of Formation Mechanism of Morphotropic Phase Boundary of Relaxor Thin Films based on Frustration of Coexisting Phases
| Project/Area Number |
15H04118
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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 |
Inorganic materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
嶋田 雄介 東北大学, 金属材料研究所, 助教 (20756572)
山田 智明 名古屋大学, 工学研究科, 准教授 (80509349)
佐藤 和久 大阪大学, 超高圧電子顕微鏡センター, 准教授 (70314424)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2016: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2015: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Keywords | リラクサー / 薄膜 / 歪み誘起相転移 / 組成相境界 / 弾性場 / 分極回転 / 電子顕微鏡 / 結合状態 / 相安定性 / 境界構造 / ドメイン構造 / 局所弾性場 / エピタキシャル薄膜 / PMN-PT / フラストレーション / 単斜晶 / ドメイン / 多相共存組織 / 歪み誘起相 / 界面変調組織 / ミスフィット転位 |
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| Outline of Final Research Achievements |
Relaxor ferroelectrics show many attractive electrical properties such as high dielectric constant, high piezoelectric constant, small temperature dependence, dielectric dispersion in the low frequency range, and electromechanical coupling factors at a composition around the morphotropic phase boundary (MPB). We have elucidated the MPB shift phenomena of relaxor and ferroelectric thin films from the viewpoint of the local strain field analysis and the nanoscale phase stability between the frustrating phases. The opposing forces between the thermal strain and the strain induced from the misfit dislocations complexly bias the stability of the frustrating pseudo cubic and tetragonal phases. Strictly, these phase act as the intermediate monoclinic phases, in which the spontaneous polarization can rotate easily between the two phases. Thus, the true nature of the characteristic morphology at a MPB composition of PMN-PT epitaxial thin films are strain induced monoclinic phases.
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Report
(4 results)
Research Products
(56 results)
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[Journal Article] Negligible substrate clamping effect on piezoelectric response in (111)-epitaxial tetragonal Pb(Zr, Ti)O3 films2015
Author(s)
Tomoaki Yamada, Jun Yasumoto, Daisuke Ito, Osami Sakata, Yasuhiko Imai, Takanori Kiguchi, Takahisa Shiraishi, Takao Shimizu, Hiroshi Funakubo, Masahito Yoshino, and Takanori Nagasaki
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Journal Title
J. Appl. Phys.
Volume: 118
Issue: 7
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Structural and piezoelectric properties in (111) tetragonal/rhombohedral Pb(Zr,Ti)O3 artificial superlattice thin films2016
Author(s)
Y. Ebihara, T. Yamada, O. Sakata, T. Kiguchi, H. Morioka, T. Shimizu, H. Funakubo, T.J. Konno, M. Yoshino and T. Nagasaki
Organizer
10th Asian Meeting on Electroceramics (AMEC-2016)
Place of Presentation
GIS TAIPEI TECH Convention Center (Taipei, Taiwan)
Year and Date
2016-12-04
Related Report
Int'l Joint Research
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[Presentation] 正方晶/菱面体晶Pb(Zr,Ti)O3 人工超格子薄膜の構造 及び圧電特性の層厚依存性2016
Author(s)
海老原洋平, 山田智明, 坂田修身, 森岡仁, 木口賢紀, 今井康彦, 清水荘雄, 舟窪浩, 吉野正人, 長﨑正雅
Organizer
第54回セラミックス基礎科学討論会
Place of Presentation
アバンセ, グランデはがくれ（佐賀県佐賀市）
Year and Date
2016-01-07
Related Report
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[Presentation] 斜方晶HfO2薄膜の強誘電相構造2015
Author(s)
中村奨梧, 範 滄宇, 木口賢紀, 白石貴久, 赤間章裕, 片山きりは, 清水荘雄, 舟窪浩, 今野豊彦
Organizer
130回東北大学金属材料研究所講演会
Place of Presentation
東北大学 片平キャンパス（宮城県仙台市青葉区）
Year and Date
2015-11-25
Related Report
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[Presentation] 斜方晶ハフニア薄膜の結晶構造と組織形成2015
Author(s)
木口賢紀, 白石貴久, 範 滄宇, 赤間章裕, 今野豊彦, 片山きりは, 清水荘雄, 舟窪浩, 今野豊彦
Organizer
第35回エレクトロセラミックス研究討論会
Place of Presentation
東京工業大学 大岡山キャンパス（東京都目黒区）
Year and Date
2015-10-22
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