Low energy spin waves and magnetic interactions in SrFe${}_2$As${}_2$

Jun Zhao, Dao-Xin Yao, Shiliang Li +12

We report inelastic neutron scattering studies of magnetic excitations in antiferromagnetically ordered SrFe${}_2$As${}_2$ ($T_N=220$ K), the parent compound of the FeAs-based su…