| 研究実績の概要 |
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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