[15p-A409-1~11] 6.3 Oxide electronics

▼ [15p-A409-5] Phase transition of high-quality epitaxial spinel Fe₃O₄ to γ-Fe₂O₃ thin films for spin-wave propagation

〇(D)Siyi Tang¹, Md Shamim Sarker¹, Kaijie Ma¹, Hiroyasu Yamahara¹, Munetoshi Seki¹, Hitoshi Tabata¹ (1.the University of Tokyo)

Keywords:Maghemite, Spin wave, Pulsed laser deposition

In this study, we fabricated high-quality epitaxial spinel ferrite Fe₃O₄ thin film as a template layer on conductive Nb:SrTiO₃ substrate, then realized phase transition to γ-Fe₂O₃ by annealing method. Spin-wave was excited by a coplanar waveguide (CPW). Frequency shifts caused by the external in-plane magnetic field change, the frequency reaches 7.3 GHz at 80 mT, which shows higher spin-wave frequency property than the conventional YIG system.