Double phase transition in the triangular antiferromagnet Ba${}_3$CoTa${}_2$O${}_9$

K. M. Ranjith, K. Brinda, U. Arjun +2

Here, we report the synthesis and magnetic properties of a new triangular lattice antiferromagnet Ba${}_3$CoTa${}_2$O${}_9$. The effective spin of Co${}^{2+}$ is found to be $J=1/2$ at low…