Gilbert Damping in Annealed Perpendicular Exchange Biased CoFeB/Pt/MnIr Multilayers

Hai Lin Hu; Jia Qi Yan; Wei Li; Xiao Yu Yang; Shi Tao Lou; X. L. Zhang

doi:10.1142/S2010324720500083

Gilbert Damping in Annealed Perpendicular Exchange Biased CoFeB/Pt/MnIr Multilayers

Hai Lin Hu
, Jia Qi Yan
, Wei Li
, Xiao Yu Yang
, Shi Tao Lou^*
, X. L. Zhang

^*Corresponding author for this work

Institute for Advanced Study in Precision Spectroscopy

Research output: Contribution to journal › Article › peer-review

Abstract

Exchange bias and intrinsic Gilbert damping α0 are two important parameters in magnetic multilayers. To explore the correlation between exchange coupling and damping, the samples Ta (2.6nm)/Pt (2.5nm)/Co62Fe25B13 (0.63nm)/Pt (0.5nm)/Mn78Ir22 (t)/Ta (4nm) are deposited by using pulsed-DC magnetron sputtering. The static and dynamic magnetic responses with different thickness of antiferromagnetic MnIr are investigated using vibrating sample magnetometer (VSM) and the pump-probe time-resolved magneto-optical Kerr effect (TR-MOKE). The exchange bias initially increases and then decreases with increasing thickness of MnIr layer, which is associated with the interfacial exchange coupling. The dynamic results demonstrate that the Gilbert damping of CoFeB/Pt/MnIr can increase by up to 40% compared with CoFeB/Pt. Based on the fact that the spin pumping has been excluded because of the Pt interlayer, we attribute the enhancement in Gilbert damping to the exchange coupling between AFM and FM.

Original language	English
Article number	2050008
Journal	SPIN
Volume	10
Issue number	1
DOIs	https://doi.org/10.1142/S2010324720500083
State	Published - 1 Mar 2020

Keywords

Exchange bias
Gilbert damping
TR-MOKE
exchange coupling
spin pumping effect

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title = "Gilbert Damping in Annealed Perpendicular Exchange Biased CoFeB/Pt/MnIr Multilayers",

abstract = "Exchange bias and intrinsic Gilbert damping α0 are two important parameters in magnetic multilayers. To explore the correlation between exchange coupling and damping, the samples Ta (2.6nm)/Pt (2.5nm)/Co62Fe25B13 (0.63nm)/Pt (0.5nm)/Mn78Ir22 (t)/Ta (4nm) are deposited by using pulsed-DC magnetron sputtering. The static and dynamic magnetic responses with different thickness of antiferromagnetic MnIr are investigated using vibrating sample magnetometer (VSM) and the pump-probe time-resolved magneto-optical Kerr effect (TR-MOKE). The exchange bias initially increases and then decreases with increasing thickness of MnIr layer, which is associated with the interfacial exchange coupling. The dynamic results demonstrate that the Gilbert damping of CoFeB/Pt/MnIr can increase by up to 40\% compared with CoFeB/Pt. Based on the fact that the spin pumping has been excluded because of the Pt interlayer, we attribute the enhancement in Gilbert damping to the exchange coupling between AFM and FM.",

keywords = "Exchange bias, Gilbert damping, TR-MOKE, exchange coupling, spin pumping effect",

author = "Hu, \{Hai Lin\} and Yan, \{Jia Qi\} and Wei Li and Yang, \{Xiao Yu\} and Lou, \{Shi Tao\} and Zhang, \{X. L.\}",

note = "Publisher Copyright: {\textcopyright} 2020 World Scientific Publishing Company.",

year = "2020",

month = mar,

day = "1",

doi = "10.1142/S2010324720500083",

language = "英语",

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T1 - Gilbert Damping in Annealed Perpendicular Exchange Biased CoFeB/Pt/MnIr Multilayers

AU - Hu, Hai Lin

AU - Yan, Jia Qi

AU - Li, Wei

AU - Yang, Xiao Yu

AU - Lou, Shi Tao

AU - Zhang, X. L.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - Exchange bias and intrinsic Gilbert damping α0 are two important parameters in magnetic multilayers. To explore the correlation between exchange coupling and damping, the samples Ta (2.6nm)/Pt (2.5nm)/Co62Fe25B13 (0.63nm)/Pt (0.5nm)/Mn78Ir22 (t)/Ta (4nm) are deposited by using pulsed-DC magnetron sputtering. The static and dynamic magnetic responses with different thickness of antiferromagnetic MnIr are investigated using vibrating sample magnetometer (VSM) and the pump-probe time-resolved magneto-optical Kerr effect (TR-MOKE). The exchange bias initially increases and then decreases with increasing thickness of MnIr layer, which is associated with the interfacial exchange coupling. The dynamic results demonstrate that the Gilbert damping of CoFeB/Pt/MnIr can increase by up to 40% compared with CoFeB/Pt. Based on the fact that the spin pumping has been excluded because of the Pt interlayer, we attribute the enhancement in Gilbert damping to the exchange coupling between AFM and FM.

AB - Exchange bias and intrinsic Gilbert damping α0 are two important parameters in magnetic multilayers. To explore the correlation between exchange coupling and damping, the samples Ta (2.6nm)/Pt (2.5nm)/Co62Fe25B13 (0.63nm)/Pt (0.5nm)/Mn78Ir22 (t)/Ta (4nm) are deposited by using pulsed-DC magnetron sputtering. The static and dynamic magnetic responses with different thickness of antiferromagnetic MnIr are investigated using vibrating sample magnetometer (VSM) and the pump-probe time-resolved magneto-optical Kerr effect (TR-MOKE). The exchange bias initially increases and then decreases with increasing thickness of MnIr layer, which is associated with the interfacial exchange coupling. The dynamic results demonstrate that the Gilbert damping of CoFeB/Pt/MnIr can increase by up to 40% compared with CoFeB/Pt. Based on the fact that the spin pumping has been excluded because of the Pt interlayer, we attribute the enhancement in Gilbert damping to the exchange coupling between AFM and FM.

KW - Exchange bias

KW - Gilbert damping

KW - TR-MOKE

KW - exchange coupling

KW - spin pumping effect

UR - https://www.scopus.com/pages/publications/85085384546

U2 - 10.1142/S2010324720500083

DO - 10.1142/S2010324720500083

M3 - 文章

AN - SCOPUS:85085384546

SN - 2010-3247

VL - 10

JO - SPIN

JF - SPIN

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M1 - 2050008

ER -

Gilbert Damping in Annealed Perpendicular Exchange Biased CoFeB/Pt/MnIr Multilayers

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Keywords

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