Elucidation of the origin of multiferroics due to spin chirality of triangular lattice antiferromagnet

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K17703
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Yokohama National University
• Principal Investigator: Watanuki Ryuta 横浜国立大学, 大学院工学研究院, 特別研究教員 (30396808)
• Research Collaborator: HIROYUKI MITAMURA 東京大学, 物性研究所, 助教
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: マルチフェロイクス / マルチフェロイック物質 / カイラリティ / 磁性 / 三角格子

Outline of Final Research Achievements

Cesium molybdate iron CsFe(MoO4)2 was successfully grown by the flux method using molybdic acid as flux. Magnetization measurements and dielectric constant measurements using this single crystal were carried out. Dielectric anomalies accompanying antiferromagnetic transition forming the 120 degrees spin structure were observed. From the consideration of the magnetic phase diagram, the result of the dielectric constant measurements and the magnetic structure, it was revealed that CsFe(MoO4)2 is highly likely to exhibit multiferroics originating from in-plane spin chirality. CsFe(MoO4)2 becomes the discovery of second case as multiferroic material of spin chirality origin.

Free Research Field

数物系科学