A Ferrotoroidic Candidate with Well‐Separated Spin Chains
Jun Zhang, Xiancheng Wang, Long Zhou, Guangxiu Liu, D. T. Adroja, Iván da Silva, F. Demmel, D. D. Khalyavin, Jhuma Sannigrahi, Hari S. Nair, Lei Duan, Jianfa Zhao, Zheng Deng, Runze Yu, Xi Shen, Richeng Yu, Hui Zhao, Jimin Zhao, Youwen Long, Zhiwei Hu, Hong‐Ji Lin, Ting‐Shan Chan, Chien‐Te Chen, Wei Wu, Changqing Jin
Abstract
Abstract The search of novel quasi‐1D materials is one of the important aspects in the field of material science. Toroidal moment, the order parameter of ferrotoroidic order, can be generated by a head‐to‐tail configuration of magnetic moment. It has been theoretically proposed that 1D dimerized and antiferromagnetic (AFM)‐like spin chain hosts ferrotoroidicity and has the toroidal moment composed of only two antiparallel spins. Here, the authors report a ferrotoroidic candidate of Ba 6 Cr 2 S 10 with such a theoretical model of spin chain. The structure consists of unique dimerized face‐sharing CrS 6 octahedral chains along the c axis. An AFM‐like ordering at ≈10 K breaks both space‐ and time‐reversal symmetries and the magnetic point group of mm ′2′allows three ferroic orders in Ba 6 Cr 2 S 10 : (anti)ferromagnetic, ferroelectric, and ferrotoroidic orders. Their investigation reveals that Ba 6 Cr 2 S 10 is a rare ferrotoroid ic candidate with quasi 1D spin chain, which can be considered as a starting point for the further exploration of the physics and applications of ferrotoroidicity.