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Temperature Evolution of Magnon Propagation Length in Tm3Fe5O12 Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping.
Chanda, Amit; Holzmann, Christian; Schulz, Noah; Ullrich, Aladin; DeTellem, Derick; Albrecht, Manfred; Gross, Miela; Ross, Caroline A; Arena, Dario A; Phan, Manh-Huong; Srikanth, Hariharan.
Afiliación
  • Chanda A; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
  • Holzmann C; Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
  • Schulz N; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
  • Ullrich A; Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
  • DeTellem D; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
  • Albrecht M; Institute of Physics, University of Augsburg, 86159 Augsburg, Germany.
  • Gross M; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
  • Ross CA; Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.
  • Arena DA; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
  • Phan MH; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
  • Srikanth H; Department of Physics, University of South Florida, Tampa, Florida 33620, United States.
ACS Nano ; 18(9): 7223-7240, 2024 Mar 05.
Article en En | MEDLINE | ID: mdl-38394644
ABSTRACT
The magnon propagation length, ⟨ξ⟩, of a ferro-/ferrimagnet (FM) is one of the key factors that controls the generation and propagation of thermally driven magnonic spin current in FM/heavy metal (HM) bilayer based spincaloritronic devices. For the development of a complete physical picture of thermally driven magnon transport in FM/HM bilayers over a wide temperature range, it is of utmost importance to understand the respective roles of temperature-dependent Gilbert damping (α) and effective magnetic anisotropy (Keff) in controlling the temperature evolution of ⟨ξ⟩. Here, we report a comprehensive investigation of the temperature-dependent longitudinal spin Seebeck effect (LSSE), radio frequency transverse susceptibility, and broad-band ferromagnetic resonance measurements on Tm3Fe5O12 (TmIG)/Pt bilayers grown on different substrates. We observe a significant drop in the LSSE voltage below 200 K independent of TmIG film thickness and substrate choice. This is attributed to the noticeable increases in effective magnetic anisotropy field, HKeff (∝Keff) and α that occur within the same temperature range. From the TmIG thickness dependence of the LSSE voltage, we determined the temperature dependence of ⟨ξ⟩ and highlighted its correlation with the temperature-dependent HKeff and α in TmIG/Pt bilayers, which will be beneficial for the development of rare-earth iron garnet based efficient spincaloritronic nanodevices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Nano Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos