2013 Fiscal Year Final Research Report
Nobel quantum phase transition in multispin systems - from multipole view point of view -
| Project/Area Number |
23540390
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KOGA Mikito 静岡大学, 教育学部, 教授 (40324321)
KUSUNOSE Hiroaki 愛媛大学, 理工学研究科, 准教授 (00292201)
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| Co-Investigator(Renkei-kenkyūsha) |
SEKINE Tomoyuki 上智大学, 理工学部, 教授 (60110722)
KUROE Haruhiko 上智大学, 理工学部, 准教授 (40296885)
KIMURA Shojiro 東北大学, 金属材料研究所, 准教授 (20379316)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 磁性 / 量子スピン系 / 多極子 / マルチフェロイクス |
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| Research Abstract |
We proposed a theory for complicated quantum spin systems in which plural spins interact with each other strongly. The strongly interacting part can be regarded as a multispin unit and we introduced a form factor that depends on magnetic structure of the multispin unit. We applied the theory to a particular materials and investigated intensity of inelastic neutron scattering. When the magnetic ion is located at a site without inversion symmetry, quadrupole operator becomes equivalent to the electric polarization. This results in maltiferroic properties. In a particular material, there are intersite quadrupole interactions. We reported that they can determine the easy axis.
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Research Products
(23 results)
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[Presentation] マルチフェロイック物質Cu3Mo2O9の強磁場磁化・分極測定2012
Author(s)
長谷川卓哉, 木野亮, 佐藤輔, 青木謙人, 伊藤龍亮, 保坂朋宏, 黒江晴彦, 関根智幸, 木原工, 徳永将史, 長谷正司, 竹端寛治, 北澤英明, 岡邦彦, 伊藤利充, 永崎洋, 松本正茂
Organizer
日本物理学会
Place of Presentation
横浜国立大学
Year and Date
20120900
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[Presentation] マルチフェロイック物質Cu3Mo2O9の強磁場磁化・分極測定2012
Author(s)
長谷川卓哉, 保坂朋宏, 伊藤龍亮, 八馬傑, 黒江晴彦, 関根智幸, 木原工, 徳永将史, 長谷正司, 岡邦彦, 伊藤利充, 永崎洋, 松本正茂
Organizer
日本物理学会
Place of Presentation
関西学院大学
Year and Date
20120300
