Spin transport across antiferromagnets induced by the spin Seebeck effect

Joel Cramer, Ulrike Ritzmann, Bo Wen Dong, Samridh Jaiswal, Zhiyong Qiu, Eiji Saitoh, Ulrich Nowak, Mathias Kläui

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

For prospective spintronics devices based on the propagation of pure spin currents, antiferromagnets are an interesting class of materials that potentially entail a number of advantages as compared to ferromagnets. Here, we present a detailed theoretical study of magnonic spin current transport in ferromagnetic-antiferromagnetic multilayers by using atomistic spin dynamics simulations. The relevant length scales of magnonic spin transport in antiferromagnets are determined. We demonstrate the transfer of angular momentum from a ferromagnet into an antiferromagnet due to the excitation of only one magnon branch in the antiferromagnet. As an experimental system, we ascertain the transport across an antiferromagnet in Y3Fe5O12 |Ir20Mn80|Pt heterostructures. We determine the spin transport signals for spin currents generated in the Y3Fe5O12 by the spin Seebeck effect and compare to measurements of the spin Hall magnetoresistance in the heterostructure stack. By means of temperature-dependent and thickness-dependent measurements, we deduce conclusions on the spin transport mechanism across Ir20Mn80 and furthermore correlate it to its paramagnetic-antiferromagnetic phase transition.

Original languageEnglish
Article number144004
JournalJournal of Physics D: Applied Physics
Volume51
Issue number14
DOIs
Publication statusPublished - 2018 Mar 14

Keywords

  • antiferromagnetic spintroncis
  • magnon spin currents
  • spin Seebeck effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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  • Cite this

    Cramer, J., Ritzmann, U., Dong, B. W., Jaiswal, S., Qiu, Z., Saitoh, E., Nowak, U., & Kläui, M. (2018). Spin transport across antiferromagnets induced by the spin Seebeck effect. Journal of Physics D: Applied Physics, 51(14), [144004]. https://doi.org/10.1088/1361-6463/aab223