Spin wave propagation detected over 100μm in half-metallic Heusler alloy Co2MnSi

• Published in: Journal of magnetism and magnetic materials 2018-03, Vol.450, p.13-17
• Main Authors: Stückler, Tobias, Liu, Chuanpu, Yu, Haiming, Heimbach, Florian, Chen, Jilei, Hu, Junfeng, Tu, Sa, Alam, Md.Shah, Zhang, Jianyu, Zhang, Youguang, Farrell, Ian L., Emeny, Chrissy, Granville, Simon, Liao, Zhi-Min, Yu, Dapeng, Zhao, Weisheng
• Format: Article
• Language: English
• Subjects: Heusler alloy; Long distance propagation; Magnonics; Spin waves
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2017.09.074

•Determining of material parameters: Spin wave stiffness, Curie temperature, damping and saturation magnetization.•Spin wave propagation over 100 μm.•Determining of cross talk. The field of magnon spintronics offers a charge current free way of information transportation by using spin waves (SWs). Compared to forward volume spin waves for example, Damon-Eshbach (DE) SWs need a relatively weak external magnetic field which is suitable for small spintronic devices. In this work we study DE SWs in Co2MnSi, a half-metallic Heusler alloy with significant potential for magnonics. Thin films have been produced by pulsed laser deposition. Integrated coplanar waveguide (CPW) antennas with different distances between emitter and detection antenna have been prepared on a Co2MnSi film. We used a vector network analyzer to measure spin wave reflection and transmission. We observe spin wave propagation up to 100μm, a new record for half-metallic Heusler thin films.