Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers

R. Ramos, T. Kikkawa, M. H. Aguirre, I. Lucas, A. Anadón, T. Oyake, K. Uchida, H. Adachi, J. Shiomi, P. A. Algarabel, L. Morellón, S. Maekawa, E. Saitoh, M. R. Ibarra

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Abstract

Spin Seebeck effects (SSEs) have been investigated in highly crystalline magnetic multilayer [Fe3O4/Pt]n films. Voltage as well as power generated by the SSE were found to be significantly enhanced with increasing the number of layers n. This voltage enhancement defies the simple understanding of the SSE and suggests that spin current flowing between the magnetic layers in the thickness direction plays an important role in multilayer SSE systems and the observed voltage enhancement.

Original languageEnglish
Article number224107
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number22
DOIs
Publication statusPublished - Dec 11 2015

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ramos, R., Kikkawa, T., Aguirre, M. H., Lucas, I., Anadón, A., Oyake, T., Uchida, K., Adachi, H., Shiomi, J., Algarabel, P. A., Morellón, L., Maekawa, S., Saitoh, E., & Ibarra, M. R. (2015). Unconventional scaling and significant enhancement of the spin Seebeck effect in multilayers. Physical Review B - Condensed Matter and Materials Physics, 92(22), [224107]. https://doi.org/10.1103/PhysRevB.92.220407