Effect of MgO Insertion between Topological Insulator Bi2Se3 and Ferromagnet NiFe Multilayer Structures

Tyck till om SwePub Sök här!

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.

Sheng, JiangGothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xsheji (författare)
Åkerman, Johan,1970Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xkerjo (författare)
Lee, S. (författare)
Göteborgs universitetInstitutionen för fysik (GU) (creator_code:org_t)

Ingår i:Journal of the Korean Magnetics Society: The Korean Magnetics Society32:1, s. 27-311598-53852233-6648

Av författaren/redakt...: Chung, S.; Sheng, Jiang; Åkerman, Johan, ...; Lee, S.

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.