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Effect of MgO Inser...
Effect of MgO Insertion between Topological Insulator Bi2Se3 and Ferromagnet NiFe Multilayer Structures
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Chung, S. (author)
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- Sheng, Jiang (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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- Åkerman, Johan, 1970 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
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Lee, S. (author)
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(creator_code:org_t)
- The Korean Magnetics Society, 2022
- 2022
- Korean.
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In: Journal of the Korean Magnetics Society. - : The Korean Magnetics Society. - 1598-5385 .- 2233-6648. ; 32:1, s. 27-31
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https://gup.ub.gu.se...
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https://doi.org/10.4...
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Abstract
Subject headings
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- We study ferromagnetic resonance (FMR) properties of topological insulator Bi2Se3 and ferromagnet NiFe (permalloy) multilayer structures. We found that Bi2Se3/NiFe shows two times larger magnetic damping than that of single NiFe, which indicates strong spin pumping exists in the interface between Bi2Se3 and NiFe. Also, 1 nm thick MgO layer was inserted into between Bi2Se3 and NiFe, where spin-pumping is expected to be suppressed. Bi2Se3/MgO/NiFe shows same amount of spin-pumping effect as observed in Bi2Se3/NiFe, while thin MgO layer can be beneficial for suppressing the formation of magnetic dead layer. These results show that 1 nm thick MgO can be utilized as a good spacer layer without a loss of spin-pumping in the multilayer structures with topological insulator.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- topological insulator
- ferromagnetic resonance
- spin pumping
- magnetic
- damping
- magnetic dead layer
- spin
- driven
- Physics
Publication and Content Type
- ref (subject category)
- art (subject category)
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