Spin-lattice-coupled helical magnetic order in breathing pyrochlore magnets, CuAlCr${}_4$S${}_8$ and CuGaCr${}_4$S${}_8$

Masaki Gen, Taro Nakajima, Hiraku Saito +2

We report low-temperature powder X-ray and neutron diffraction studies on breathing pyrochlore magnets Cu$M$Cr${}_4$S${}_8$ ($M$ = Al, Ga), which undergo a magnetic transition at $…