Spin singlet formation in MgTi${}_2$O${}_4$: evidence of a helical dimerization pattern

M. Schmidt, W. Ratcliff, P. G. Radaelli +3

The transition metal spinel MgTi${}_2$O${}_4$ undergoes a metal-insulator transition on cooling below $T_{M-I}=260$ K. A sharp reduction of the magnetic susceptibility below $T_{M-I}…