In this study, we investigate the magnetoelectric (ME) effect of the newly discovered antiferromagnetic (AFM) compound Ce3TiBi5 with a hexagonal structure (space group P63/mcm). In this system, Ce ions form zig-zag chains that extend along the c-axis. We focus on the lack of the local inversion symmetry at the Ce site, although the crystal structure has an inversion center. A theoretical study has predicted that magnetization can be induced by an electric current in the AFM ordering on the zig-zag chain. We conducted magnetization measurements on Ce3TiBi5 under an applied constant electric current and a static magnetic field around the AFM ordering temperature of TN = 5.0 K. We successfully observed of the current-induced magnetization below TN. The magnitude of the current-induced magnetization has a linear electric current dependence and exhibits no magnetic field dependence. This behavior is consistent with the theoretical prediction of the ME effect in the ferrotoroidal ordered state.
@article{arxiv.2002.11980,
title = {Magnetoelectric Effect in the Antiferromagnetic Ordered State of Ce$_{3}$TiBi$_{5}$ with Ce Zig-Zag Chains},
author = {Masahiro Shinozaki and Gaku Motoyama and Masahiro Tsubouchi and Masumi Sezaki and Jun Gouchi and Shijo Nishigori and Tetsuya Mutou and Akira Yamaguchi and Kenji Fujiwara and Kiyotaka Miyoshi and Yoshiya Uwatoko},
journal= {arXiv preprint arXiv:2002.11980},
year = {2020}
}