In this study, we analyze the correlation between magnetization and magnetoresistance of perpendicularly anisotropic [Co/Pd] multilayered films with different thicknesses of Pd layers tPd = 0.6–2.0 nm in a wide range of temperatures, T = 4–300 K. We revealed that electron scattering by magnons makes a significant contribution to the magnetoresistance of the multilayers regardless of the layer thickness. Contrary to expectations, the effect of magnon magnetoresistance (MMR) increases with decreasing temperature below T = 50 K in the films with tPd = 0.8 and 1.0 nm. The revealed low-temperature MMR increase, which is most pronounced in the [Co0.5/Pd1.0] multilayers, is associated with the enhanced magnon excitation due to antiferromagnetic exchange coupling between the Co layers. The latter ensures an atypical shape of the magnetization curves of the [Co0.5/Pd1.0] multilayers at low temperatures in a perpendicular magnetic field, which combine a quadratic hysteresis loop of a perpendicularly anisotropic ferromagnet and an anomalous magnetization drop resulting from a violation of the ordering of magnetic moments and their amplified oscillations initiated by the interlayer exchange coupling.
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6 May 2024
Research Article|
May 09 2024
The enhancement of low-temperature excitation of magnons via interlayer exchange coupling in perpendicularly magnetized [Co/Pd] multilayers
Special Collection:
Magnonics
Julia Kasiuk
;
Julia Kasiuk
(Conceptualization, Methodology, Writing – original draft)
1
Faculty of Physics, Belarusian State University
, 4 Nezavisimosti Ave., Minsk 220030, Belarus
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Wen-Bin Wu
;
Wen-Bin Wu
(Methodology, Validation, Writing – original draft)
2
College of Physical Science and Technology, Dalian University
, Dalian 116622, China
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Janusz Przewoźnik
;
Janusz Przewoźnik
(Data curation, Investigation, Resources, Writing – review & editing)
3AGH University of Krakow,
Faculty of Physics and Applied Computer Science, Department of Solid State Physics
, 30 A. Mickiewicza Ave., Krakow 30-059, Poland
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Czesław Kapusta
;
Czesław Kapusta
(Data curation, Investigation, Resources, Writing – review & editing)
3AGH University of Krakow,
Faculty of Physics and Applied Computer Science, Department of Solid State Physics
, 30 A. Mickiewicza Ave., Krakow 30-059, Poland
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Ivan Svito
;
Ivan Svito
(Data curation, Investigation, Resources)
1
Faculty of Physics, Belarusian State University
, 4 Nezavisimosti Ave., Minsk 220030, Belarus
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Thanh Huong Nguyen
;
Thanh Huong Nguyen
(Data curation, Investigation, Resources)
4
Institute of Materials Science, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
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Khanh Tung Do
;
Khanh Tung Do
(Software, Validation)
4
Institute of Materials Science, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
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Dang Thanh Tran
;
Dang Thanh Tran
(Software, Validation)
4
Institute of Materials Science, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
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Hung Manh Do
;
Hung Manh Do
(Software, Validation)
4
Institute of Materials Science, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
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Johan Åkerman
;
Johan Åkerman
(Resources, Writing – review & editing)
5
Department of Physics, University of Gothenburg
, Göteborg 41296, Sweden
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Thi Ngoc Anh Nguyen
Thi Ngoc Anh Nguyen
a)
(Conceptualization, Methodology, Writing – original draft, Writing – review & editing)
4
Institute of Materials Science, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
6
Graduate University of Science and Technology, Vietnam Academy of Science and Technology
, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11355, Vietnam
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 124, 192407 (2024)
Article history
Received:
November 30 2023
Accepted:
April 24 2024
Citation
Julia Kasiuk, Wen-Bin Wu, Janusz Przewoźnik, Czesław Kapusta, Ivan Svito, Thanh Huong Nguyen, Khanh Tung Do, Dang Thanh Tran, Hung Manh Do, Johan Åkerman, Thi Ngoc Anh Nguyen; The enhancement of low-temperature excitation of magnons via interlayer exchange coupling in perpendicularly magnetized [Co/Pd] multilayers. Appl. Phys. Lett. 6 May 2024; 124 (19): 192407. https://doi.org/10.1063/5.0189741
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