Microwave control of thermal-magnon spin transport

J. Liu (Corresponding author), F. Feringa, B. Flebus, L.J. Cornelissen, J.C. Leutenantsmeyer, R.A. Duine, B.J. van Wees

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

We observe that an rf microwave field strongly influences the transport of incoherent thermal magnons in yttrium iron garnet. Ferromagnetic resonance in the nonlinear regime suppresses thermal magnon transport by 95%. The transport is also modulated at nonresonant conditions in two cases, both related to the magnon band minimum. Firstly, a strong enhancement of the nonlocal signal appears at a static magnetic field below the resonance condition. This increase only occurs at one field polarity and can be as large as 800%. We attribute this effect to magnon kinetic processes, which give rise to band-minimum magnons and high-energy chiral surface modes. Secondly, the signal increases at a static field above the resonance condition, where the rf frequency coincides with the magnon band minimum. Our study gives insight into the interplay between coherent and incoherent spin dynamics: the rf field modifies the occupation of relevant magnon states and, via kinetic processes, the magnon spin transport.

TaalEngels
Artikelnummer054420
Aantal pagina's8
TijdschriftPhysical Review B
Volume99
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 19 feb 2019

Vingerafdruk

Microwaves
Spin dynamics
Yttrium
microwaves
Ferromagnetic resonance
magnons
Kinetics
Garnets
Interfacial energy
Iron
yttrium-iron garnet
kinetics
ferromagnetic resonance
spin dynamics
Magnetic fields
occupation
polarity
augmentation
magnetic fields
Hot Temperature

Citeer dit

Liu, J., Feringa, F., Flebus, B., Cornelissen, L. J., Leutenantsmeyer, J. C., Duine, R. A., & van Wees, B. J. (2019). Microwave control of thermal-magnon spin transport. Physical Review B, 99(5), [054420]. DOI: 10.1103/PhysRevB.99.054420
Liu, J. ; Feringa, F. ; Flebus, B. ; Cornelissen, L.J. ; Leutenantsmeyer, J.C. ; Duine, R.A. ; van Wees, B.J./ Microwave control of thermal-magnon spin transport. In: Physical Review B. 2019 ; Vol. 99, Nr. 5.
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abstract = "We observe that an rf microwave field strongly influences the transport of incoherent thermal magnons in yttrium iron garnet. Ferromagnetic resonance in the nonlinear regime suppresses thermal magnon transport by 95{\%}. The transport is also modulated at nonresonant conditions in two cases, both related to the magnon band minimum. Firstly, a strong enhancement of the nonlocal signal appears at a static magnetic field below the resonance condition. This increase only occurs at one field polarity and can be as large as 800{\%}. We attribute this effect to magnon kinetic processes, which give rise to band-minimum magnons and high-energy chiral surface modes. Secondly, the signal increases at a static field above the resonance condition, where the rf frequency coincides with the magnon band minimum. Our study gives insight into the interplay between coherent and incoherent spin dynamics: the rf field modifies the occupation of relevant magnon states and, via kinetic processes, the magnon spin transport.",
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Liu, J, Feringa, F, Flebus, B, Cornelissen, LJ, Leutenantsmeyer, JC, Duine, RA & van Wees, BJ 2019, 'Microwave control of thermal-magnon spin transport' Physical Review B, vol. 99, nr. 5, 054420. DOI: 10.1103/PhysRevB.99.054420

Microwave control of thermal-magnon spin transport. / Liu, J. (Corresponding author); Feringa, F.; Flebus, B.; Cornelissen, L.J.; Leutenantsmeyer, J.C.; Duine, R.A.; van Wees, B.J.

In: Physical Review B, Vol. 99, Nr. 5, 054420, 19.02.2019.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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AU - Feringa,F.

AU - Flebus,B.

AU - Cornelissen,L.J.

AU - Leutenantsmeyer,J.C.

AU - Duine,R.A.

AU - van Wees,B.J.

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AB - We observe that an rf microwave field strongly influences the transport of incoherent thermal magnons in yttrium iron garnet. Ferromagnetic resonance in the nonlinear regime suppresses thermal magnon transport by 95%. The transport is also modulated at nonresonant conditions in two cases, both related to the magnon band minimum. Firstly, a strong enhancement of the nonlocal signal appears at a static magnetic field below the resonance condition. This increase only occurs at one field polarity and can be as large as 800%. We attribute this effect to magnon kinetic processes, which give rise to band-minimum magnons and high-energy chiral surface modes. Secondly, the signal increases at a static field above the resonance condition, where the rf frequency coincides with the magnon band minimum. Our study gives insight into the interplay between coherent and incoherent spin dynamics: the rf field modifies the occupation of relevant magnon states and, via kinetic processes, the magnon spin transport.

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Liu J, Feringa F, Flebus B, Cornelissen LJ, Leutenantsmeyer JC, Duine RA et al. Microwave control of thermal-magnon spin transport. Physical Review B. 2019 feb 19;99(5). 054420. Beschikbaar vanaf, DOI: 10.1103/PhysRevB.99.054420