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A Ferrotoroidic Candidate with Well-Separated Spin Chains

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Hu,  Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Zhang, J., Wang, X., Zhou, L., Liu, G., Adroja, D. T., da Silva, I., et al. (2022). A Ferrotoroidic Candidate with Well-Separated Spin Chains. Advanced Materials, 2106728, pp. 1-8. doi:10.1002/adma.202106728.


Cite as: http://hdl.handle.net/21.11116/0000-000A-1558-C
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 Ba6Cr2S10 with such a theoretical model of spin chain. The structure consists of unique dimerized face-sharing CrS6 octahedral chains along the c axis. An AFM-like ordering at approximate to 10 K breaks both space- and time-reversal symmetries and the magnetic point group of mm ' 2 ' allows three ferroic orders in Ba6Cr2S10: (anti)ferromagnetic, ferroelectric, and ferrotoroidic orders. Their investigation reveals that Ba6Cr2S10 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.