Magnetic order and fluctuations in quasi-two-dimensional planar magnet Sr(Co${}_{1-x}$Ni${}_x$)${}_2$As${}_2$

Yaofeng Xie, Yu Li, Zhiping Yin +9

We use neutron scattering to investigate spin excitations in Sr(Co${}_{1-x}$Ni${}_x{)}_2$As${}_2$, which has a $c$-axis incommensurate helical structure of the two-dimensional (2D) in-pl…