2015 Fiscal Year Final Research Report
Development of a high speed imaging system combined with pulse magnets
| Project/Area Number |
25610087
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Research Collaborator |
SHIBUYA Jumpei
KAWACHI Shiro
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | マルチフェロイクス / 磁性 / メモリー効果 / イメージング |
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| Outline of Final Research Achievements |
We developed a high speed imaging system, which can be combined with pulse magnets. This new system enables us to observe microscope images of the sample in wide range of magnetic field and temperature and also in the transmission configuration. In evaluation of the basic properties of the target multiferroic materials, we found novel field-induced ferroelectric phase in a chiral antiferromagnet and non-volatile magnetoelectric memory effects in bismuth ferrite. High field imaging of the bismuth ferrite with using the newly developed system revealed that domain structures visible in the near infrared light were irrelevant to the magnetoelectric domains that were expected to play the key role in the memory effect.
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| Free Research Field |
強磁場物性
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