Half-metallic Heusler alloys are receiving significant attention for spintronic applications utilizing magnetic tunnel junctions and requiring large spin polarization. Co2MnSi (CMS) is one of the most promising candidates for this purpose. Here, we report the magnetization dynamics of a thin, epitaxial CMS film in a magnetic CoFe/CMS bilayer structure sputtered on an MgO substrate. The magnetic precession frequency response of the CoFe/CMS bilayer shows a fourfold symmetry with respect to the azimuthal applied field angle, reflecting the crystal symmetry of the CMS layer and not the underlying CoFe film. Moreover, the effective Gilbert damping parameter exhibits inhomogeneous broadening at lower applied magnetic fields. At large fields, however, the azimuthal angle dependence disappears, and the intrinsic Gilbert damping is observed. This study provides insight into the dynamics of a magnetic bilayer structure that forms an integral element in spintronic applications.
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7 March 2023
Research Article|
March 01 2023
Magnetization dynamics of a CoFe/Co2MnSi magnetic bilayer structure
Special Collection:
Recent Advances in Magnonics
Sujung Kim
;
Sujung Kim
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft)
1
Department of Electrical and Computer Engineering, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
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Yawen Guo
;
Yawen Guo
(Data curation, Investigation, Software, Visualization, Writing – review & editing)
1
Department of Electrical and Computer Engineering, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
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Weigang Yang
;
Weigang Yang
(Data curation, Investigation)
1
Department of Electrical and Computer Engineering, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
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Toyanath Joshi;
Toyanath Joshi
(Data curation, Investigation)
2
Department of Physics, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
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David Lederman
;
David Lederman
(Data curation, Formal analysis, Investigation, Resources, Validation, Visualization, Writing – review & editing)
2
Department of Physics, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
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Holger Schmidt
Holger Schmidt
a)
(Conceptualization, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Supervision, Validation, Writing – original draft, Writing – review & editing)
1
Department of Electrical and Computer Engineering, University of California Santa Cruz
, 1156 High Street, Santa Cruz, California 95064, USA
a)Author to whom correspondence should be addressed: hschmidt@ucsc.edu
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a)Author to whom correspondence should be addressed: hschmidt@ucsc.edu
Note: This paper is part of the Special Topic on Recent Advances in Magnonics.
J. Appl. Phys. 133, 093902 (2023)
Article history
Received:
September 28 2022
Accepted:
February 08 2023
Citation
Sujung Kim, Yawen Guo, Weigang Yang, Toyanath Joshi, David Lederman, Holger Schmidt; Magnetization dynamics of a CoFe/Co2MnSi magnetic bilayer structure. J. Appl. Phys. 7 March 2023; 133 (9): 093902. https://doi.org/10.1063/5.0128519
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