[26a-E201-1~12] 10.2 Fundamental and exploratory device technologies for spin

[26a-E201-5] Spin wave propagation in metallic magnonic quasi-crystals

Kanata Fujii¹, Kenji Kasahara¹, Kazuyuki Nakayama¹, 〇Takashi Manago¹ (1.Fukuoka Univ.)

Keywords:Spin wave, quasi-periodic magnonic crystal, Fibonacci

The spin wave propagation characteristics of quasi-periodic magnonic crystals (QMC) with Fibonacci columns were investigated using simulations. In the dispersion relation, branches reflecting the quasiperit period are observed, and the spin wave feels a period of one-third of the Fibonacci characteristic length, and a number of small bandgaps appear. In addition, the non-reciprocal nature changes for each frequency region separated by the band gap, and the non-reciprocality occurs in almost 0 and negative regions. It is unique characteristics of QMC.