A puzzling insensitivity of magnon spin diffusion to the presence of 180${}^{\circ }$ domain walls in a ferrimagnetic insulator

Ruofan Li, Lauren J. Riddiford, Yahong Chai +12

We present room-temperature measurements of magnon spin diffusion in epitaxial ferrimagnetic insulator MgAl${}_{0.5}$Fe${}_{1.5}$O${}_4$ (MAFO) thin films near zero applied magnetic fi…