著者

本田 孝志

出版者

日本高圧力学会

雑誌

高圧力の科学と技術 (ISSN:0917639X)

巻号頁・発行日

vol.26, no.2, pp.149-156, 2016 (Released:2016-06-21)

参考文献数

28

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In this article, we introduce our recent high-pressure study on magnetism and multiferroicity in olivine-type Mn2GeO4. This compound shows successive magnetic transitions at ambient pressure and a ferroelectric ground state driven by spin-spiral order, i.e., a multiferroic state. The multiferroicity under high pressure was taken by using a recently constructed measurement system equipped with a diamond anvil cell. The pressure evolution of the magnetic structures was investigated with powder and single-crystal neutron scattering experiments using a Paris-Edinburgh press. We found that the ferroelectricity in the lowest-temperature phase disappears at 6 GPa where an incommensurate-commensurate magnetic phase transition is observed. The origin of the pressure-induced transition is discussed. Some details of the high-pressure experimental techniques will be also presented.