2017 Fiscal Year Annual Research Report
Exploring novel magnetoelastic coupling via polyhedral or molecular rotation in unusual quantum spin systems
| Project/Area Number |
16K17758
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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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| Keywords | Weak ferromagnet / Neutron diffraction / SuperHRPD / Cobalt trifluoride / Iron trifluoride / Crystallography / Magnetic structure |
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| Outline of Annual 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) and superoxide KO2, and etc. Except TiF3 study due to sample problems, we obtained meaningful x-ray and neutron diffraction data. Crystal and magnetic structural analysis is going well.
In early era of neutron diffraction study in 1958, E. O. Wollan et al.(Phys. Rev. 112 1132) reported magnetic structure of CoF3 and FeF3. However, (101) and (003) rhombohedral peaks were not distinguished well due to poor resolution of neutron powder diffractometer. By using high resolution neutron powder diffractometer, we confirm room temperature magnetic structure. Also, we find low-temperature weak-ferromagnetic transition in CoF3.
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