2014 Fiscal Year Final Research Report
Electric control of the ferromagnetic domain in ferromagnetic insulators
| Project/Area Number |
25707032
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Partial Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo (2014)
Institute of Physical and Chemical Research (2013) |
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Principal Investigator |
TOKUNAGA Yusuke 東京大学, 新領域創成科学研究科, 准教授 (50613387)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | マルチフェロイックス / 電気磁気効果 / 電場磁化制御 / 低消費電力デバイス / 磁気記録 |
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| Outline of Final Research Achievements |
In a multiferroic orthoferrite Dy0.7Tb0.3FeO3, which shows electric-field-(E-)driven magnetization (M) reversal, magnetic-field (H) biasing on ferroelectric hysteresis loops is observed. The magnitude of the bias E field can be controlled by varying the magnitude of H, and its sign can be reversed by changing the sign of H. In addition, we have succeeded in growing single crystals of ferroelectric-ferromagnetic h-Lu0.5Sc0.5FeO3 and room-temperature helical magnet Ba2Co2Fe11AlO22 by means of floating zone method, whose magnetization is potentially controlled by E. We could evaluate physical properties of these syngle crystals. In particular, the magnetic structure of h-Lu0.5Sc0.5FeO3 has successfully been determined by neutron diffraction measurements.
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| Free Research Field |
固体物性
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