Spin wave propagation in perpendicularly magnetized nm-thick yttrium iron garnet films

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:450

Article

Chen, Jilei¹  Heimbach, Florian¹  Liu, Tao²  Yu, Haiming¹  Liu, Chuanpu^1,3,4  Chang, Houchen²  Stueckler, Tobias¹  Hu, Junfeng¹  Zeng, Lang¹  Zhang, Youguang¹  Liao, Zhimin^3,4  Yu, Dapeng^3,4,5  Zhao, Weisheng¹  Wu, Mingzhong² 

[1] Beihang Univ, BDBC, Sch Elect & Informat Engn, Fert Beijing Inst, Xueyuan Rd 37, Beijing 100191, Peoples R China

[2] Colorado State Univ, Dept Phys, Ft Collins, CO 80523 USA

[3] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[4] Peking Univ, Sch Phys, Electron Microscopy Lab, Beijing 100871, Peoples R China

[5] Southern Univ Sci & Technol, Phys Dept, Shenzhen 518055, Peoples R China

关键词: Magnonics;    Spin waves;    Antenna design;    Yttrium iron garnet;   

DOI  :  10.1016/j.jmmm.2017.04.045

来源: Elsevier

【 摘 要 】

Magnonics offers a new way for information transport that uses spin waves (SWs) and is free of charge currents. Unlike Damon-Eshbach SWs, the magneto-static forward volume SWs offer the reciprocity configuration suitable for SW logic devices with low power consumption. Here, we study forward volume SW propagation in yttrium iron garnet (YIG) thin films with an ultra-low damping constant alpha = 8 x 10(-5). We design different integrated microwave antenna with different k-vector excitation distributions on YIG thin films. Using a vector network analyzer, we measured SW transmission with the films magnetized in perpendicular orientation. Based on the experimental results, we extract the group velocity as well as the dispersion relation of SWs and directly compare the power efficiency of SW propagation in YIG using coplanar waveguide and micro stripline for SW excitation and detection. (C) 2017 Published by Elsevier B.V.

【 授权许可】

Free