Hydrogen-Controlled Spin Reorientation Transition in a Nanometer-Thick FePd Layer on Co/[Pt/Co]4/Pt Multilayers for Applications in Spintronics

Kun Jen Hsueh; Po Chun Chang; Li Jie Liaw; Alltrin Dhanarajagopal; Minn Tsong Lin; Wen Chin Lin

doi:10.1021/acsanm.2c05095

Hydrogen-Controlled Spin Reorientation Transition in a Nanometer-Thick FePd Layer on Co/[Pt/Co]₄/Pt Multilayers for Applications in Spintronics

Kun Jen Hsueh, Po Chun Chang, Li Jie Liaw, Alltrin Dhanarajagopal, Minn Tsong Lin^*, Wen Chin Lin^*

^*Corresponding author for this work

Department of Physics

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

7 Citations (Scopus)

Abstract

In this study, we deposited a hydrogen-sensitive FePd alloy film on Co/[Pt/Co]₄/Pt multilayers with perpendicular magnetic anisotropy (PMA). Through hydrogenation, spin-reorientation transition (SRT) from a perpendicular to an in-plane direction was observed in the 2-nm-thick FePd capped multilayer. Magneto-optic Kerr effect measurements were performed in hydrogen gas at pressures ranging from a vacuum of 5 × 10^-3 mbar to H₂ gas at 200 mbar. Reversible SRT was demonstrated with the cyclic change of H₂ pressure. Furthermore, tuning the strength of the PMA multilayer by adjusting the thickness of the Pt layer changed the SRT-critical thickness of the FePd cap and the hydrogen-induced SRT behavior. These findings will be valuable for application in spintronics through the electronic control of H-migration.

Original language	English
Pages (from-to)	2784-2790
Number of pages	7
Journal	ACS Applied Nano Materials
Volume	6
Issue number	4
DOIs	https://doi.org/10.1021/acsanm.2c05095
Publication status	Published - 2023 Feb 24

Keywords

hydrogen absorption
magnetic thin film
multilayer
perpendicular magnetic anisotropy
spin reorientation transition

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/acsanm.2c05095

Cite this

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title = "Hydrogen-Controlled Spin Reorientation Transition in a Nanometer-Thick FePd Layer on Co/[Pt/Co]4/Pt Multilayers for Applications in Spintronics",

abstract = "In this study, we deposited a hydrogen-sensitive FePd alloy film on Co/[Pt/Co]4/Pt multilayers with perpendicular magnetic anisotropy (PMA). Through hydrogenation, spin-reorientation transition (SRT) from a perpendicular to an in-plane direction was observed in the 2-nm-thick FePd capped multilayer. Magneto-optic Kerr effect measurements were performed in hydrogen gas at pressures ranging from a vacuum of 5 × 10-3 mbar to H2 gas at 200 mbar. Reversible SRT was demonstrated with the cyclic change of H2 pressure. Furthermore, tuning the strength of the PMA multilayer by adjusting the thickness of the Pt layer changed the SRT-critical thickness of the FePd cap and the hydrogen-induced SRT behavior. These findings will be valuable for application in spintronics through the electronic control of H-migration.",

keywords = "hydrogen absorption, magnetic thin film, multilayer, perpendicular magnetic anisotropy, spin reorientation transition",

author = "Hsueh, {Kun Jen} and Chang, {Po Chun} and Liaw, {Li Jie} and Alltrin Dhanarajagopal and Lin, {Minn Tsong} and Lin, {Wen Chin}",

note = "Publisher Copyright: {\textcopyright} 2023 American Chemical Society.",

year = "2023",

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doi = "10.1021/acsanm.2c05095",

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T1 - Hydrogen-Controlled Spin Reorientation Transition in a Nanometer-Thick FePd Layer on Co/[Pt/Co]4/Pt Multilayers for Applications in Spintronics

AU - Hsueh, Kun Jen

AU - Chang, Po Chun

AU - Liaw, Li Jie

AU - Dhanarajagopal, Alltrin

AU - Lin, Minn Tsong

AU - Lin, Wen Chin

PY - 2023/2/24

Y1 - 2023/2/24

N2 - In this study, we deposited a hydrogen-sensitive FePd alloy film on Co/[Pt/Co]4/Pt multilayers with perpendicular magnetic anisotropy (PMA). Through hydrogenation, spin-reorientation transition (SRT) from a perpendicular to an in-plane direction was observed in the 2-nm-thick FePd capped multilayer. Magneto-optic Kerr effect measurements were performed in hydrogen gas at pressures ranging from a vacuum of 5 × 10-3 mbar to H2 gas at 200 mbar. Reversible SRT was demonstrated with the cyclic change of H2 pressure. Furthermore, tuning the strength of the PMA multilayer by adjusting the thickness of the Pt layer changed the SRT-critical thickness of the FePd cap and the hydrogen-induced SRT behavior. These findings will be valuable for application in spintronics through the electronic control of H-migration.

AB - In this study, we deposited a hydrogen-sensitive FePd alloy film on Co/[Pt/Co]4/Pt multilayers with perpendicular magnetic anisotropy (PMA). Through hydrogenation, spin-reorientation transition (SRT) from a perpendicular to an in-plane direction was observed in the 2-nm-thick FePd capped multilayer. Magneto-optic Kerr effect measurements were performed in hydrogen gas at pressures ranging from a vacuum of 5 × 10-3 mbar to H2 gas at 200 mbar. Reversible SRT was demonstrated with the cyclic change of H2 pressure. Furthermore, tuning the strength of the PMA multilayer by adjusting the thickness of the Pt layer changed the SRT-critical thickness of the FePd cap and the hydrogen-induced SRT behavior. These findings will be valuable for application in spintronics through the electronic control of H-migration.

KW - hydrogen absorption

KW - magnetic thin film

KW - multilayer

KW - perpendicular magnetic anisotropy

KW - spin reorientation transition

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