Origin of magnetically dead layers in spinel ferrites $M{\text{Fe}}_2{\text{O}}_4$ grown on ${\text{Al}}_2{\text{O}}_3$: Effects of post-deposition annealing studied by XMCD

Yosuke Nonaka, Yuki K. Wakabayashi, Goro Shibata +8

We study the electronic and magnetic states of as-grown and annealed $M{\text{Fe}}_2{\text{O}}_4$(111)/${\text{Al}}_2{\text{O}}_3$(111) ($M=\text{Co, Ni}$) thin films with various thicknes…