Room-temperature spontaneous perpendicular exchange bias in IrMn/[Co/Pt]3 multilayers

Jiabin Wang; Xilai Bao; Jinxia Chen; Mengting Zou; Yali Xie; Run-Wei Li; Xiaoguang Li; Yanwei Cao; Baomin Wang

doi:10.1088/1367-2630/ad7636

New Journal of Physics (Jan 2024)

Room-temperature spontaneous perpendicular exchange bias in IrMn/[Co/Pt]3 multilayers

Jiabin Wang,
Xilai Bao,
Jinxia Chen,
Mengting Zou,
Yali Xie,
Run-Wei Li,
Xiaoguang Li,
Yanwei Cao,
Baomin Wang

Affiliations

Jiabin Wang: School of Physical Science and Technology, Ningbo University , Ningbo 315211, People’s Republic of China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China; Nano Science and Technology Institute, University of Science and Technology of China , Suzhou 215123, People’s Republic of China
Xilai Bao: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Jinxia Chen: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Mengting Zou: School of Physical Science and Technology, Ningbo University , Ningbo 315211, People’s Republic of China; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Yali Xie: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Run-Wei Li: ORCiD; CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Xiaoguang Li: ORCiD; Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China , Hefei 230026, People’s Republic of China
Yanwei Cao: CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering , Chinese Academy of Sciences, Ningbo 315201, People’s Republic of China
Baomin Wang: School of Physical Science and Technology, Ningbo University , Ningbo 315211, People’s Republic of China

DOI: https://doi.org/10.1088/1367-2630/ad7636
Journal volume & issue: Vol. 26, no. 9
p. 093013

Abstract

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Perpendicular exchange bias (PEB) is highly desirable for the development of advanced nanoscale spintronics devices. The attainment of conventional PEB typically involves a field-cooling process through the Néel temperature of antiferromagnetic materials. In this study, we demonstrated the realization of spontaneous PEB (SPEB) in IrMn/[Co/Pt] _3 multilayers utilizing isothermal crystallization of IrMn at room temperature (RT). And the SPEB generated isothermally at IrMn/Co interface does not destroy the perpendicular magnetic anisotropy of the multilayers. The magnetic domains of the multilayers captured by Kerr microscopy after different magnetization time also indicate the generation of SPEB. The magnitude of SPEB can be controllable by varying the isothermal magnetization time and the annealing temperature of IrMn. The relationship between magnetization waiting time and SPEB reveals that even slight isothermal crystallization can generate substantial SPEB. Our results provide an alternative approach to isothermally generate PEB in IrMn/[Co/Pt] _3 multilayers at RT.

Published in New Journal of Physics

ISSN: 1367-2630 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1367-2630

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