2012 Fiscal Year Final Research Report
FORMATION MECHANISM OF SPOTANEOUS SUPERLATTICE BY APPLICATION OFMAGNETIC FIELD DURING DEPOSITION AND STRUCTURE INDUCED FERROELECTRICITY
| Project/Area Number |
22360270
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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 | Shizuoka University |
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Principal Investigator |
WAKIYA Naoki 静岡大学, 工学部, 教授 (40251623)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Hisao 静岡大学, 創造科学技術大学院, 教授 (70154573)
SAKAMOTO Naonori 静岡大学, 工学部, 助教 (80451996)
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| Co-Investigator(Renkei-kenkyūsha) |
SHINOZAKI Kazuo 東京工業大学, 理工学研究科, 教授 (00196388)
FU Desheng 静岡大学, 手グローバル研究リーダー育成拠点, 特認准教授 (30422546)
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| Project Period (FY) |
2010 – 2012
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| Keywords | PLD / 磁場印加 / SrTiO3 / 強誘電体 / 超格子 |
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| Research Abstract |
Spontaneous formation of superlattice is observed for homoepitaxially grown SrTiO3thin film with Sr-excess composition deposited on Nb-SrTiO3(001) single crystal substrate when the film was deposited using PLD in the magnetic field. It was clarified that this phenomenon is caused by surface-directed spinodal decomposition. This film shows ferroelectricity even at room temperature. This phenomenon would be caused by the internal strain that forms at the interface of layers with different composition.
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