Structural distortion below the Néel temperature in spinel GeCo${}_2$O${}_4$

Phillip T. Barton, Moureen C. Kemei, Michael W. Gaultois +5

A structural phase transition from cubic $Fd\bar{3}m$ to tetragonal $I$4${}_1$/$amd$ symmetry with $c/a>$ 1 is observed at $T_{\mathrm{S}}$ = 16 K in spinel GeCo${}_2$O${}_4$ below the Néel…