Field-Induced Two-Step Phase Transitions in the Singlet Ground State Triangular Antiferromagnet CsFeBr${}_3$

Y. Tanaka, H. Tanaka, T. Ono +7

The ground state of the stacked triangular antiferromagnet CsFeBr${}_3$ is a spin singlet due to the large single ion anisotropy $D(S^z{)}^2$. The field-induced magnetic ordering in th…