Geometric frustration on the trillium lattice in a magnetic metal-organic framework

Johnathan M. Bulled, Joseph A. M. Paddison, Andrew Wildes +6

In the dense metal-organic framework Na[Mn(HCOO)${}_3$], Mn${}^{2+}$ ions ($S=\frac{5}{2}$) occupy the nodes of a `trillium' hyperkagome net. We show that this material exhibits a vari…