[25a-P01-1~51] 10 Spintronics and Magnetics (Poster)

English Presentation

[25a-P01-29] Study of surface and bulk spin wave modes for the epitaxial antiferromagnetic α-Fe₂O₃ thin film

〇(M2)Soojung KIM¹, Won-Chang CHOI¹, Jaehun CHO², Eunchong BAEK¹, Jungil HONG¹, Chun-Yeol YOU¹ (1.Department of Physics and Chemistry, DGIST, Daegu 42988, Republic of Korea, 2.Division of Nanotechnology, DGIST, Daegu 42988, Republic of Korea)

Keywords:

spin wave,Hematite,Brillouin Light Scattering

Antiferromagnetic materials (AFM) are getting more attention in spintronics because of large group velocity (over 20 km/s) and long diffusion length (up to 10 um) for spin wave transport in AFM. Among them, α-Fe₂O₃ exhibits an intriguing canted magnetic moment (~3 emu/cm3) induced by the bulk Dyzaloshinskii-Moriya interaction. Recent researches report ultrafast transport of spin wave with low damping in α-Fe₂O₃ with thicknesses of hundreds of micrometers. Unlike bulk α-Fe₂O₃, however, the transport properties of spin wave in thin film have not yet been fully explored. In this study, we investigate the magnetic properties in the α-Fe₂O₃ thin film by analyzing resonance frequencies in the ferromagnetic resonance and μ-Brillouin light scattering.