Exploring novel magnetoelastic coupling via polyhedral or molecular rotation in unusual quantum spin systems
| Project/Area Number |
16K17758
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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 II
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Lee Sanghyun 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 研究員 (70722031)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | Perovskite / Fluoride / Superoxide / Neutron diffraction / Magnetism / Crystallography / Phase transition / Weak ferromagnet / SuperHRPD / Cobalt trifluoride / Iron trifluoride / Magnetic structure / Condensed matter physics / Diffraction / Symmetry |
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| Outline of Final Research Achievements |
Exploring novel magnetoelastic coupling via polyhedral or molecular rotation in unusual quantum spin systems, we studied perovskite-type TF3(T=Sc, Ti, Cr, Mn, Fe, Co), superoxide KO2, and etc. The crystal and magnetic structural analysis is going well.
E. O. Wollan et al.(Phys. Rev. 112 1132) reported magnetic structure of CoF3 and FeF3. However, (101) and (003) hexagonal peaks were not distinguished well due to poor resolution of neutron powder diffractometer. By using high resolution neutron powder diffractometer, we confirm the magnetic structure at room temperature. The Fe antiferromagnetic moment is inside hexagonal plane while Co antiferromagnetic moment is parallel with c-axis. DM interaction induces spin canting in the case of FeF3 that causes weak-ferromagnetism. In addition, we find low-temperature weak-ferromagnetic transition in CoF3. This result suggest the Co spin canting will induces weak-ferromagnetism by DM interaction below 40 K.
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Report
(3 results)
Research Products
(8 results)
