Print Email Facebook Twitter Current-induced spin-wave excitation in Pt/YIG bilayer Title Current-induced spin-wave excitation in Pt/YIG bilayer Author Zhou, Y. Jiao, H. Chen, Y. Bauer, G.E.W. Xiao, J. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2013-11-04 Abstract We develop a self-consistent theory for current-induced spin-wave excitations in normal metal/magnetic insulator bilayer structures. We compute the spin-wave dispersion and dissipation, including dipolar and exchange interactions in the magnet, the spin diffusion in the normal metal, as well as the surface anisotropy, spin-transfer torque, and spin pumping at the interface. We find that (1) the spin-transfer torque and spin pumping affect the surface modes more than the bulk modes; (2) spin pumping inhibits high-frequency spin-wave modes, thereby redshifting the excitation spectrum; (3) easy-axis surface anisotropy induces a new type of surface spin wave, which reduces the excitation threshold current and greatly enhances the excitation power. We propose that the magnetic insulator surface can be engineered to create spin-wave circuits utilizing surface spin waves as information carriers. To reference this document use: http://resolver.tudelft.nl/uuid:14abe290-b2d8-4657-bc86-ef16f71e3176 DOI https://doi.org/10.1103/PhysRevB.88.184403 Publisher American Physical Society ISSN 1098-0121 Source http://link.aps.org/doi/10.1103/PhysRevB.88.184403 Source Physical Review B, 88 (18), 2013 Part of collection Institutional Repository Document type journal article Rights © 2013 American Physical Society Files PDF Jiao_2013.pdf 1.11 MB Close viewer /islandora/object/uuid:14abe290-b2d8-4657-bc86-ef16f71e3176/datastream/OBJ/view