Geometric Frustration on the Trillium Lattice in a Magnetic Metal-Organic Framework
Geometric Frustration on the Trillium Lattice in a Magnetic Metal-Organic Framework
In the dense metal-organic framework Na[Mn(HCOO)_{3}], Mn^{2+} ions (S=5/2) occupy the nodes of a "trillium" net. We show that the system is strongly magnetically frustrated: the Néel transition is suppressed well below the characteristic magnetic interaction strength; short-range magnetic order persists far above the Néel temperature; and the magnetic susceptibility …