Evidence of coupling between magnon excitation and the Gilbert damping in half-metallic oxides

Xianyang Lu; Lewis J. Atkinson; Balati Kuerbanjiang; Bo Liu; Guanqi Li; Yichuan Wang; Junlin Wang; Xuezhong Ruan; Jing Wu; Richard F. L. Evans; Vlado K. Lazarov; Roy W. Chantrell; Yongbing Xu

Evidence of coupling between magnon excitation and the Gilbert damping in half-metallic oxides

Xianyang Lu, Lewis J. Atkinson, Balati Kuerbanjiang, Bo Liu, Guanqi Li, Yichuan Wang, Junlin Wang, Xuezhong Ruan, Jing Wu, Richard F. L. Evans, Vlado K. Lazarov, Roy W. Chantrell, Yongbing Xu

Research output: Working paper › Preprint

Abstract

Gilbert damping in precessional spin dynamics has been investigated in defect-controlled epitaxial grown Fe$_3$O$_4$$(111)/$YSZ films by all-optical pump-probe measurements. It is demonstrated that the perpendicular standing spin wave (PSSW mode) is exclusively observed in the annealed film without atomic defects. The numerical simulation results confirm the presence of a standing wave in addition to the coherent magnetic precession (Kittel mode). The intrinsic damping constant $\alpha_0=0.063\pm0.010$ of the annealed Fe$_3$O$_4$ film was found to be strikingly larger than that of the as-grown film of $\alpha_0=0.039\pm0.004$. Our work has demonstrated that the PSSW mode leads to the enhancement of the Gilbert damping associated with the emergence of an additional energy transfer channel from the excited magnon to the uniform spin precession in the defect free Fe$_3$O$_4$.

Original language	English
Publisher	Arxiv (Cornell University)
Publication status	Published - 30 Oct 2017

Keywords

cond-mat.mtrl-sci

Access to Document

https://arxiv.org/abs/1710.10938

Cite this

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title = "Evidence of coupling between magnon excitation and the Gilbert damping in half-metallic oxides",

abstract = "Gilbert damping in precessional spin dynamics has been investigated in defect-controlled epitaxial grown Fe$_3$O$_4$$(111)/$YSZ films by all-optical pump-probe measurements. It is demonstrated that the perpendicular standing spin wave (PSSW mode) is exclusively observed in the annealed film without atomic defects. The numerical simulation results confirm the presence of a standing wave in addition to the coherent magnetic precession (Kittel mode). The intrinsic damping constant $\alpha_0=0.063\pm0.010$ of the annealed Fe$_3$O$_4$ film was found to be strikingly larger than that of the as-grown film of $\alpha_0=0.039\pm0.004$. Our work has demonstrated that the PSSW mode leads to the enhancement of the Gilbert damping associated with the emergence of an additional energy transfer channel from the excited magnon to the uniform spin precession in the defect free Fe$_3$O$_4$.",

keywords = "cond-mat.mtrl-sci",

author = "Xianyang Lu and Atkinson, {Lewis J.} and Balati Kuerbanjiang and Bo Liu and Guanqi Li and Yichuan Wang and Junlin Wang and Xuezhong Ruan and Jing Wu and Evans, {Richard F. L.} and Lazarov, {Vlado K.} and Chantrell, {Roy W.} and Yongbing Xu",

year = "2017",

month = oct,

day = "30",

language = "English",

publisher = "Arxiv (Cornell University)",

type = "WorkingPaper",

institution = "Arxiv (Cornell University)",

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TY - UNPB

T1 - Evidence of coupling between magnon excitation and the Gilbert damping in half-metallic oxides

AU - Lu, Xianyang

AU - Atkinson, Lewis J.

AU - Kuerbanjiang, Balati

AU - Liu, Bo

AU - Li, Guanqi

AU - Wang, Yichuan

AU - Wang, Junlin

AU - Ruan, Xuezhong

AU - Wu, Jing

AU - Evans, Richard F. L.

AU - Lazarov, Vlado K.

AU - Chantrell, Roy W.

AU - Xu, Yongbing

PY - 2017/10/30

Y1 - 2017/10/30

N2 - Gilbert damping in precessional spin dynamics has been investigated in defect-controlled epitaxial grown Fe$_3$O$_4$$(111)/$YSZ films by all-optical pump-probe measurements. It is demonstrated that the perpendicular standing spin wave (PSSW mode) is exclusively observed in the annealed film without atomic defects. The numerical simulation results confirm the presence of a standing wave in addition to the coherent magnetic precession (Kittel mode). The intrinsic damping constant $\alpha_0=0.063\pm0.010$ of the annealed Fe$_3$O$_4$ film was found to be strikingly larger than that of the as-grown film of $\alpha_0=0.039\pm0.004$. Our work has demonstrated that the PSSW mode leads to the enhancement of the Gilbert damping associated with the emergence of an additional energy transfer channel from the excited magnon to the uniform spin precession in the defect free Fe$_3$O$_4$.

AB - Gilbert damping in precessional spin dynamics has been investigated in defect-controlled epitaxial grown Fe$_3$O$_4$$(111)/$YSZ films by all-optical pump-probe measurements. It is demonstrated that the perpendicular standing spin wave (PSSW mode) is exclusively observed in the annealed film without atomic defects. The numerical simulation results confirm the presence of a standing wave in addition to the coherent magnetic precession (Kittel mode). The intrinsic damping constant $\alpha_0=0.063\pm0.010$ of the annealed Fe$_3$O$_4$ film was found to be strikingly larger than that of the as-grown film of $\alpha_0=0.039\pm0.004$. Our work has demonstrated that the PSSW mode leads to the enhancement of the Gilbert damping associated with the emergence of an additional energy transfer channel from the excited magnon to the uniform spin precession in the defect free Fe$_3$O$_4$.

KW - cond-mat.mtrl-sci

M3 - Preprint

BT - Evidence of coupling between magnon excitation and the Gilbert damping in half-metallic oxides

PB - Arxiv (Cornell University)

ER -