Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures

Stefan Klingler; Vivek Amin; Stephan Geprägs; Kathrin Ganzhorn; Hannes Maier-Flaig; Matthias Althammer; Hans Huebl; Rudolf Gross; Robert D. McMichael; Mark D. Stiles; Sebastian T.B. Goennenwein; Mathias Weiler

doi:10.1103/PhysRevLett.120.127201

Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures

Stefan Klingler, Vivek Amin, Stephan Geprägs, Kathrin Ganzhorn, Hannes Maier-Flaig, Matthias Althammer, Hans Huebl, Rudolf Gross, Robert D. McMichael, Mark D. Stiles, Sebastian T.B. Goennenwein, Mathias Weiler

Chair of Technical Physics

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151 Scopus citations

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 interlayer but persists with a copper interlayer, in agreement with the proposed model.

Original language	English
Article number	127201
Journal	Physical Review Letters
Volume	120
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.120.127201
State	Published - 23 Mar 2018

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Klingler, S., Amin, V., Geprägs, S., Ganzhorn, K., Maier-Flaig, H., Althammer, M., Huebl, H., Gross, R., McMichael, R. D., Stiles, M. D., Goennenwein, S. T. B., & Weiler, M. (2018). Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures. Physical Review Letters, 120(12), Article 127201. https://doi.org/10.1103/PhysRevLett.120.127201

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title = "Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures",

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 interlayer but persists with a copper interlayer, in agreement with the proposed model.",

author = "Stefan Klingler and Vivek Amin and Stephan Gepr{\"a}gs and Kathrin Ganzhorn and Hannes Maier-Flaig and Matthias Althammer and Hans Huebl and Rudolf Gross and McMichael, {Robert D.} and Stiles, {Mark D.} and Goennenwein, {Sebastian T.B.} and Mathias Weiler",

note = "Publisher Copyright: {\textcopyright} 2018 us. {\textcopyright} 2018 American Physical Society. American Physical Society.",

year = "2018",

month = mar,

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doi = "10.1103/PhysRevLett.120.127201",

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T1 - Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures

AU - Klingler, Stefan

AU - Amin, Vivek

AU - Geprägs, Stephan

AU - Ganzhorn, Kathrin

AU - Maier-Flaig, Hannes

AU - Althammer, Matthias

AU - Huebl, Hans

AU - Gross, Rudolf

AU - McMichael, Robert D.

AU - Stiles, Mark D.

AU - Goennenwein, Sebastian T.B.

AU - Weiler, Mathias

PY - 2018/3/23

Y1 - 2018/3/23

N2 - 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 interlayer but persists with a copper interlayer, in agreement with the proposed model.

AB - 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 interlayer but persists with a copper interlayer, in agreement with the proposed model.

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U2 - 10.1103/PhysRevLett.120.127201

DO - 10.1103/PhysRevLett.120.127201

M3 - Article

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AN - SCOPUS:85044409762

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 12

M1 - 127201

ER -

Spin-Torque Excitation of Perpendicular Standing Spin Waves in Coupled YIG/Co Heterostructures

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