Neutron scattering activities on multiferroic systems; Neutron diffraction experiments on hexaferrites

マルチフェロイック系の中性子散乱研究; ヘクサフェライトの中性子回折実験

加倉井 和久; 脇本 秀一  ; 石渡 晋太郎*; 奥山 大輔*; 西 正和*; 徳永 祐介*; 有馬 孝尚*; 田口 康二郎*; 十倉 好紀*

Kakurai, Kazuhisa; Wakimoto, Shuichi; Ishiwata, Shintaro*; Okuyama, Daisuke*; Nishi, Masakazu*; Tokunaga, Yusuke*; Arima, Takahisa*; Taguchi, Yasujiro*; Tokura, Yoshiki*

The discovery of magnetoelectric (ME) effects caused by a cycloidal spin order has initiated an intense research on new class of ME materials. Among them one interesting class of materials is the hexaferrites such as Y-type (AMeFeO: Me=transition metal), M-type (AFeO: A=Pb, Ca, Sr, Ba, etc.), where types of elementary blocks and their stacking order are different. These materials show a variety of complex magnetic ordering. In this presentation recent neutron diffraction experiments on multiferroic hexaferrites performed at the JRR-3 Neutron Science Facility of Japan Atomic Energy Agency (JAEA) are reported.