Magnetic and dielectric properties of HoFeO and RR'FeO (R, R': rare earths)

Yoshii, Kenji  ; Yoneda, Yasuhiro   ; Maeda, Daisuke*; Yokota, Yusuke*; Michiuchi, Takamasa*; Komatsu, Takuma*; Ikeda, Naoshi*; Matsuo, Yoji*; Mori, Shigeo*

We have investigated the physical properties of HoFeO and RR'FeO (R, R': rare earths). Dielectric measurements showed their dielectric constants of 1000 at around room temperature, which is characteristic of the RFeO series (R: rare earths). However, the magnetic transition temperatures and the coherency in dielectric response were found to be different from those of RFeO reported so far. Interestingly, these materials suggested higher ferroelectric temperatures than those reported so far, suggesting a possibility of application of these materials.