Preferred magnetic excitations in Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$

Jianqing Guo, Li Yue, Kazuki Iida +5

We have used inelastic neutron scattering to determine magnetic excitations in a single-crystal sample of Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$. The material's two magnetic phases, which di…