Spin frustration and magnetic ordering in triangular lattice antiferromagnet Ca${}_3$CoNb${}_2$O${}_9$

J. Dai, P. Zhou, P. S. Wang +5

We synthesized a quasi-two-dimensional distorted triangular lattice antiferromagnet Ca${}_3$CoNb${}_2$O${}_9$, in which the effective spin of Co${}^{2+}$ is 1/2 at low temperatures, whose…