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Spin-torque excitation of perpendicular standing spin waves in coupled YIG/Co heterostructures
Published
Author(s)
Stefan Klinger, Vivek P. Amin, Stephan Gepraegs, Kathrin Ganzhorn, Hannes Maier-Flaig, Matthias Althammer, Hans Huebl, Rudolf Gross, Robert McMichael, Mark D. Stiles, Sebastian Goennenwein, Mathias Weiler
Abstract
We investigate yttrium iron garnet (YIG)/cobalt (Co) heterostructures using broadband ferromagnetic resonance (FMR). We observe an efficient excitation of perpendicular standing spin waves (PSSWs) in the YIG layer when the resonance frequencies of the YIG PSSWs and the Co FMR line coincide. Avoided crossings of YIG PSSWs and the Co FMR line are found and modeled using mutual spin pumping and exchange torques. The excitation of PSSWs is suppressed by a thin aluminum oxide (AlOx) interlayer but persists with a copper (Cu) interlayer, in agreement with the proposed model.
Klinger, S.
, Amin, V.
, Gepraegs, S.
, Ganzhorn, K.
, Maier-Flaig, H.
, Althammer, M.
, Huebl, H.
, Gross, R.
, McMichael, R.
, Stiles, M.
, Goennenwein, S.
and Weiler, M.
(2018),
Spin-torque excitation of perpendicular standing spin waves in coupled YIG/Co heterostructures, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.120.127201, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924797
(Accessed October 11, 2025)