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Interfacial Dzyaloshinskii-Moriya Interaction in Pt/CoFeB Films: Effect of the Heavy-Metal Thickness.
Tacchi, S; Troncoso, R E; Ahlberg, M; Gubbiotti, G; Madami, M; Åkerman, J; Landeros, P.
Afiliación
  • Tacchi S; Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, I-06123 Perugia, Italy.
  • Troncoso RE; Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680, Valparaíso, Chile.
  • Ahlberg M; Department of Physics, University of Gothenburg, SE-41296 Gothenburg, Sweden.
  • Gubbiotti G; Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, I-06123 Perugia, Italy.
  • Madami M; Dipartimento di Fisica e Geologia, Università di Perugia, I-06123 Perugia, Italy.
  • Åkerman J; Department of Physics, University of Gothenburg, SE-41296 Gothenburg, Sweden.
  • Landeros P; Materials and Nano Physics, Royal Institute of Technology (KTH), SE-164 40 Kista, Sweden.
Phys Rev Lett ; 118(14): 147201, 2017 Apr 07.
Article en En | MEDLINE | ID: mdl-28430498
We report the observation of a Pt layer thickness dependence on the induced interfacial Dzyaloshinskii-Moriya interaction in ultrathin Pt(d_{Pt})/CoFeB films. Taking advantage of the large spin-orbit coupling of the heavy metal, the interfacial Dzyaloshinskii-Moriya interaction is quantified by Brillouin light scattering measurements of the frequency nonreciprocity of spin waves in the ferromagnet. The magnitude of the induced Dzyaloshinskii-Moriya coupling is found to saturate to a value of 0.45 mJ/m^{2} for Pt thicknesses larger than ∼2 nm. The experimental results are explained by analytical calculations based on the three-site indirect exchange mechanism that predicts a Dzyaloshinskii-Moriya interaction at the interface between a ferromagnetic thin layer and a heavy metal. Our findings open up a way to control and optimize chiral effects in ferromagnetic thin films through the thickness of the heavy-metal layer.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2017 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2017 Tipo del documento: Article País de afiliación: Italia Pais de publicación: Estados Unidos