Reducing switching current with Gilbert damping constant in nanomagnets with perpendicular anisotropy under Dzyaloshinskii–Moriya interaction

Abstract We report current-induced magnetization switching ( j sw ) with a nanosecond-duration pulse current ( t p ) in a perpendicularly magnetized nanomagnet under the Dzyaloshinskii–Moriya interaction (DMI) and investigate the effect of the Gilbert damping constant ( α ), t p , and DMI value ( D...

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Published inApplied physics express Vol. 16; no. 11; pp. 113001 - 113004
Main Authors Yamada, Keisuke, Takamatsu, Shun-ichi, Asakawa, Hiroki, Nakatani, Yoshinobu
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2023
Subjects
Dzyaloshinskii–Moriya interaction
Gilbert damping constant
magnetization switching
nanomagnet
spin-transfer torque
STT-MRAM
thermal stability
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Abstract Abstract We report current-induced magnetization switching ( j sw ) with a nanosecond-duration pulse current ( t p ) in a perpendicularly magnetized nanomagnet under the Dzyaloshinskii–Moriya interaction (DMI) and investigate the effect of the Gilbert damping constant ( α ), t p , and DMI value ( D ) on j sw via micromagnetic simulations. When α is sufficiently small at t p = 1 ns, j sw for D = 1.0 erg cm −2 decreases by 42% compared to that for D = 0 erg cm −2 . Further, j sw can be reduced under the DMI when α is small and t p is short, which is attributed to the twisted magnetization and increased initial magnetization angle.
AbstractList Abstract We report current-induced magnetization switching ( j sw ) with a nanosecond-duration pulse current ( t p ) in a perpendicularly magnetized nanomagnet under the Dzyaloshinskii–Moriya interaction (DMI) and investigate the effect of the Gilbert damping constant ( α ), t p , and DMI value ( D ) on j sw via micromagnetic simulations. When α is sufficiently small at t p = 1 ns, j sw for D = 1.0 erg cm −2 decreases by 42% compared to that for D = 0 erg cm −2 . Further, j sw can be reduced under the DMI when α is small and t p is short, which is attributed to the twisted magnetization and increased initial magnetization angle.
Author Yamada, Keisuke
Nakatani, Yoshinobu
Asakawa, Hiroki
Takamatsu, Shun-ichi
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Snippet Abstract We report current-induced magnetization switching ( j sw ) with a nanosecond-duration pulse current ( t p ) in a perpendicularly magnetized nanomagnet...
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SubjectTerms Dzyaloshinskii–Moriya interaction
Gilbert damping constant
magnetization switching
nanomagnet
spin-transfer torque
STT-MRAM
thermal stability
Title Reducing switching current with Gilbert damping constant in nanomagnets with perpendicular anisotropy under Dzyaloshinskii–Moriya interaction
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