2013 Fiscal Year Final Research Report
Development of temperature measurements in pulsed magnetic fields and its application to magnetic shape-memory alloys
| Project/Area Number |
23340096
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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 |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 磁性 / 強磁場物性 / 磁気熱量効果 |
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| Research Abstract |
We developed high-speed measurements of sample temperature in pulsed high magnetic fields. In pulsed magnetic fields, we can easily achieve adiabatic magnetization process because of the small heat exchange between the sample and thermal bath in the short duration of pulsed field. Thus, we established reliable measurements of magneto-caloric effects in pulsed fields up to 55 T. With using this system, we measured magneto-caloric effects in magnetic shape memory alloys, which has been regarded to show large inverse magneto-caloric effects. Our experimental results clarified the direct evidence of this effect for the first time. In addition, through careful discussion on the results, we succeeded in evaluating each contribution of spin, charge, and lattice to this effect, and concluded the lattice sector showed the largest contribution to this effect.
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[Journal Article] Optical imaging and magnetocaloric effect measurements in pulsed high magnetic fields and their application to Ni-Co-Mn-In Heusler alloy2013
Author(s)
T. Kihara, I. Katakura, M. Tokunaga, A. Matsuo, K. Kawaguchi, A. Kondo, K. Kindo, W. Ito, X. Xu, R, and Kainuma
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Journal Title
J. Alloys and Compd
Volume: 577S
Pages: S722-S725
DOI
Peer Reviewed
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