[14p-K303-1~13] 10.2 Fundamental and exploratory device technologies for spin

2:45 PM - 3:00 PM JST(5:45 AM - 6:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[14p-K303-6] Investigation of origin of spin wave nonreciprocity

〇Haruka Komiyama¹, Kotaro Taga¹, Ryusuke Hisatomi^1,2,3, Hiroki Matsumoto¹, Hideki Narita^1,3, Shutaro Karube^1,2,3, Yoichi Shiota^1,2, Teruo Ono^1,2 (1.ICR, Kyoto Univ., 2.CSRN, Kyoto Univ., 3.PREST, JST)

Keywords:

spin wave,nonreciprocity,magneto-optical imaging

Spin wave nonreciprocity, defined as the difference in characteristics depending on the propagation direction, provides functionality to magnonic devices. Spin wave nonreciprocity has primarily been studied using electrical measurements. However, it is difficult to identify the origin of nonreciprocity with this method because the signal contains contributions from both excitation and propagation effects. In addition, previous studies have focused only on specific magnetic field configurations. In this study, we use conventional electrical measurements and magneto-optical imaging measurements to observe the spatial distribution of spin waves while sweeping the magnetic field angle to investigate the origin of spin wave nonreciprocity. As a result, we find that the excitation and propagation effects are the origins of spin wave nonreciprocity in different magnetic field angle regions.