2012 Fiscal Year Final Research Report
Microscopic physical properties and visualization of the crystallographic, electric, and magnetic domains in multiferroics
| Project/Area Number |
23740239
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
ASAKA Toru 名古屋工業大学, 工学研究科, 助教 (80525973)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 誘電体 / マルチフェロイックス / 磁性体 / 電子顕微鏡 |
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| Research Abstract |
Crystallographic, electric, and magnetic domain structures in multiferroics and the related materials were investigated by in situ TEM with changing temperature, magnetic field, and electric one. We found a modulated structure, which is related to the helical magnetic structure, in a hexaferrite which exhibits magnetoelectric properties at room temperature. We developed a new method of observation of the domain structures. By adopting the in situ observation methods, we found temperature- and magnetic-field-induced structural phase transitions in a double perovskite cobaltate.
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