Exchange bias effect in epitaxial La0.35Sr0.65MnO3/La0.7Sr0.3MnO3 bilayers: Impact of antiferromagnet growth conditions

Xuwen Zhao; Hon Fai Wong; Yu Kuai Liu; Sheung Mei Ng; Wang Fai Cheng; Chee Leung Mak; Chi Wah Leung

doi:10.1016/j.vacuum.2020.109280

Exchange bias effect in epitaxial La_0.35Sr_0.65MnO₃/La_0.7Sr_0.3MnO₃ bilayers: Impact of antiferromagnet growth conditions

Xuwen Zhao, Hon Fai Wong, Yu Kuai Liu, Sheung Mei Ng, Wang Fai Cheng, Chee Leung Mak, Chi Wah Leung

Research output: Journal article publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

Abstract

Antiferromagnets have shown great potential for replacing ferromagnets in spintronics applications in recent years. In this work, antiferromagnetic La_0.35Sr_0.65MnO₃ (AFM-LSMO) thin films were grown on ultrathin ferromagnetic La_0.7Sr_0.3MnO₃ (FM-LSMO) layer over a wide temperature range. The different AFM-LSMO growth temperatures introduced variation of strain states in the AFM-LSMO layer, changing the AFM-LSMO magnetic properties. Considering the thermally activated switching model of antiferromagnetic grains, the behaviour of AFM-LSMO growth temperature-dependent exchange bias effect are explained. This work demonstrates the modulation of exchange bias effect through the control of AFM-LSMO growth conditions, suggesting possibility to control and probe oxide antiferromagnets via exchange bias coupling.

Original language	English
Article number	109280
Journal	Vacuum
Volume	175
DOIs	https://doi.org/10.1016/j.vacuum.2020.109280
Publication status	Published - May 2020

Keywords

Exchange bias effect
Perovskite oxide thin films
Pulsed laser deposition

ASJC Scopus subject areas

Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films

More information

10.1016/j.vacuum.2020.109280

http://hdl.handle.net/10397/100228

Cite this

@article{92bcf59398894ef18b876fb43ca6cdcd,

title = "Exchange bias effect in epitaxial La0.35Sr0.65MnO3/La0.7Sr0.3MnO3 bilayers: Impact of antiferromagnet growth conditions",

abstract = "Antiferromagnets have shown great potential for replacing ferromagnets in spintronics applications in recent years. In this work, antiferromagnetic La0.35Sr0.65MnO3 (AFM-LSMO) thin films were grown on ultrathin ferromagnetic La0.7Sr0.3MnO3 (FM-LSMO) layer over a wide temperature range. The different AFM-LSMO growth temperatures introduced variation of strain states in the AFM-LSMO layer, changing the AFM-LSMO magnetic properties. Considering the thermally activated switching model of antiferromagnetic grains, the behaviour of AFM-LSMO growth temperature-dependent exchange bias effect are explained. This work demonstrates the modulation of exchange bias effect through the control of AFM-LSMO growth conditions, suggesting possibility to control and probe oxide antiferromagnets via exchange bias coupling.",

keywords = "Exchange bias effect, Perovskite oxide thin films, Pulsed laser deposition",

author = "Xuwen Zhao and Wong, {Hon Fai} and Liu, {Yu Kuai} and Ng, {Sheung Mei} and Cheng, {Wang Fai} and Mak, {Chee Leung} and Leung, {Chi Wah}",

year = "2020",

month = may,

doi = "10.1016/j.vacuum.2020.109280",

language = "English",

volume = "175",

journal = "Vacuum",

issn = "0042-207X",

publisher = "Elsevier Ltd",

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T1 - Exchange bias effect in epitaxial La0.35Sr0.65MnO3/La0.7Sr0.3MnO3 bilayers: Impact of antiferromagnet growth conditions

AU - Zhao, Xuwen

AU - Wong, Hon Fai

AU - Liu, Yu Kuai

AU - Ng, Sheung Mei

AU - Cheng, Wang Fai

AU - Mak, Chee Leung

AU - Leung, Chi Wah

PY - 2020/5

Y1 - 2020/5

N2 - Antiferromagnets have shown great potential for replacing ferromagnets in spintronics applications in recent years. In this work, antiferromagnetic La0.35Sr0.65MnO3 (AFM-LSMO) thin films were grown on ultrathin ferromagnetic La0.7Sr0.3MnO3 (FM-LSMO) layer over a wide temperature range. The different AFM-LSMO growth temperatures introduced variation of strain states in the AFM-LSMO layer, changing the AFM-LSMO magnetic properties. Considering the thermally activated switching model of antiferromagnetic grains, the behaviour of AFM-LSMO growth temperature-dependent exchange bias effect are explained. This work demonstrates the modulation of exchange bias effect through the control of AFM-LSMO growth conditions, suggesting possibility to control and probe oxide antiferromagnets via exchange bias coupling.

AB - Antiferromagnets have shown great potential for replacing ferromagnets in spintronics applications in recent years. In this work, antiferromagnetic La0.35Sr0.65MnO3 (AFM-LSMO) thin films were grown on ultrathin ferromagnetic La0.7Sr0.3MnO3 (FM-LSMO) layer over a wide temperature range. The different AFM-LSMO growth temperatures introduced variation of strain states in the AFM-LSMO layer, changing the AFM-LSMO magnetic properties. Considering the thermally activated switching model of antiferromagnetic grains, the behaviour of AFM-LSMO growth temperature-dependent exchange bias effect are explained. This work demonstrates the modulation of exchange bias effect through the control of AFM-LSMO growth conditions, suggesting possibility to control and probe oxide antiferromagnets via exchange bias coupling.

KW - Exchange bias effect

KW - Perovskite oxide thin films

KW - Pulsed laser deposition

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