THz Field-induced Spin Dynamics in Ferrimagnetic Iron Garnets

T.G.H. Blank; K.A. Grishunin; E.A. Mashkovich; M.V. Logunov; A.K. Zvezdin; A.V. Kimel

doi:10.48550/arXiv.2103.02449

THz Field-induced Spin Dynamics in Ferrimagnetic Iron Garnets

T.G.H. Blank (Corresponding author), K.A. Grishunin, E.A. Mashkovich, M.V. Logunov, A.K. Zvezdin, A.V. Kimel

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Abstract

THz magnetization dynamics is excited in ferrimagnetic thulium iron garnet with a picosecond, single-cycle magnetic field pulse and seen as a high-frequency modulation of the magneto-optical Faraday effect. Data analysis combined with numerical modelling and evaluation of the effective Lagrangian allow us to conclude that the dynamics corresponds to the exchange mode excited by Zeeman interaction of the THz field with the antiferromagnetically coupled spins. We argue that THz-pump IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.

Original language	English
Article number	2103.02449
Number of pages	17
Journal	arXiv
Volume	2021
DOIs	https://doi.org/10.48550/arXiv.2103.02449
Publication status	Published - 3 Mar 2021
Externally published	Yes

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title = "THz Field-induced Spin Dynamics in Ferrimagnetic Iron Garnets",

abstract = "THz magnetization dynamics is excited in ferrimagnetic thulium iron garnet with a picosecond, single-cycle magnetic field pulse and seen as a high-frequency modulation of the magneto-optical Faraday effect. Data analysis combined with numerical modelling and evaluation of the effective Lagrangian allow us to conclude that the dynamics corresponds to the exchange mode excited by Zeeman interaction of the THz field with the antiferromagnetically coupled spins. We argue that THz-pump IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.",

author = "T.G.H. Blank and K.A. Grishunin and E.A. Mashkovich and M.V. Logunov and A.K. Zvezdin and A.V. Kimel",

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T1 - THz Field-induced Spin Dynamics in Ferrimagnetic Iron Garnets

AU - Blank, T.G.H.

AU - Grishunin, K.A.

AU - Mashkovich, E.A.

AU - Logunov, M.V.

AU - Zvezdin, A.K.

AU - Kimel, A.V.

PY - 2021/3/3

Y1 - 2021/3/3

N2 - THz magnetization dynamics is excited in ferrimagnetic thulium iron garnet with a picosecond, single-cycle magnetic field pulse and seen as a high-frequency modulation of the magneto-optical Faraday effect. Data analysis combined with numerical modelling and evaluation of the effective Lagrangian allow us to conclude that the dynamics corresponds to the exchange mode excited by Zeeman interaction of the THz field with the antiferromagnetically coupled spins. We argue that THz-pump IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.

AB - THz magnetization dynamics is excited in ferrimagnetic thulium iron garnet with a picosecond, single-cycle magnetic field pulse and seen as a high-frequency modulation of the magneto-optical Faraday effect. Data analysis combined with numerical modelling and evaluation of the effective Lagrangian allow us to conclude that the dynamics corresponds to the exchange mode excited by Zeeman interaction of the THz field with the antiferromagnetically coupled spins. We argue that THz-pump IR-probe experiments on ferrimagnets offer a unique tool for quantitative studies of dynamics and mechanisms to control antiferromagnetically coupled spins.

U2 - 10.48550/arXiv.2103.02449

DO - 10.48550/arXiv.2103.02449

M3 - Article

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VL - 2021

JO - arXiv

JF - arXiv

M1 - 2103.02449

ER -

THz Field-induced Spin Dynamics in Ferrimagnetic Iron Garnets

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