Magnetic Phase Diagram of the S=1/2 Triangular-Lattice Heisenberg Antiferromagnet Ba3CoNb2O9

Kazuya Yokota, Nobuyuki Kurita, Hidekazu Tanaka

We report the results of low-temperature thermal and magnetic measurements on Ba${}_3$CoNb${}_2$O${}_9$ powder, described as a uniform triangular-lattice antiferromagnet (TLAF) with a fi…