Pressure control of magnetic order and excitations in the pyrochlore antiferromagnet MgCr${}_2$O${}_4$

L. S. Nassar, H. Lane, B. Haberl +4

MgCr${}_2$O${}_4$ is one of the best-known realizations of the pyrochlore-lattice Heisenberg antiferromagnet. The strong antiferromagnetic exchange interactions are perturbed by sm…