Microwave non-reciprocity of magnon excitations in a non-centrosymmetric antiferromagnet Ba${}_2$MnGe${}_2$O${}_7$

Y. Iguchi, Y. Nii, M. Kawano +3

We have investigated the microwave non-reciprocity for a non-centrosymmetric antiferromagnet Ba${}_2$MnGe${}_2$O${}_7$. The magnon modes expected by the conventional spin wave theory for…