[11p-M101-8~14] 10.2 Fundamental and exploratory device technologies for spin

▲ [11p-M101-8] Influence of conductivity on magnetostatic surface spin waves

〇Takashi Manago¹, Kenji Kasahara¹, Aziz Mustafa², Ogrin Feodor², Volodymyr Kruglyak² (1.Fukuoka Univ., 2.Univ. Exeter)

Keywords:spin wave, simulation, conductivity

Conductivity of metals could affect the spin wave propagation properties. In our previous paper, thicker wave guide of Py showed high group velocity, but the decay length did not increase very much. We performed a micromagnetic simulation incorporating conductivity in order to investigate whether the conductivity affects the decay length.
The group velocity from wave form are overestimated and it is remarkable for the results incorporating conductivity. The overestimation originates from a dispersive propagation due to many k vectors containing in the excited spin waves. Additionally, damping due to conductivity plays an important role for the overestimation. With conductivity, the decay length increases initially for thin Py thickness but tends to decreases with thickness. Conductivity enhances damping of the spin wave and so the decay length does not increase .