Strong interfacial Dzyaloshinskii-Moriya induced in Co due to contact with NiO.

Kowacz, M; Mazalski, P; Sveklo, I; Matczak, M; Anastaziak, B; Guzowska, U; Dhiman, A K; Madej, E; Maziewski, A; Kuswik, P; Gieniusz, R

Kowacz, M; Mazalski, P; Sveklo, I; Matczak, M; Anastaziak, B; Guzowska, U; Dhiman, A K; Madej, E; Maziewski, A; Kuswik, P; Gieniusz, R.

Afiliación

Kowacz M; Institute of Molecular Physics Polish Academy of Sciences, Poznan, Poland.
Mazalski P; Faculty of Physics, University of Bialystok, Bialystok, Poland. piotrmaz@uwb.edu.pl.
Sveklo I; Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków, Poland. piotrmaz@uwb.edu.pl.
Matczak M; Faculty of Physics, University of Bialystok, Bialystok, Poland.
Anastaziak B; Faculty of Physics, University of Bialystok, Bialystok, Poland.
Guzowska U; Institute of Molecular Physics Polish Academy of Sciences, Poznan, Poland.
Dhiman AK; NanoBioMedical Centre, Adam Mickiewicz University in Poznan, Poznan, Poland.
Madej E; Faculty of Physics, University of Bialystok, Bialystok, Poland.
Maziewski A; Faculty of Physics, University of Bialystok, Bialystok, Poland.
Kuswik P; Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków, Poland.
Gieniusz R; Faculty of Physics, University of Bialystok, Bialystok, Poland.

Sci Rep ; 12(1): 12741, 2022 Jul 26.

Article en En | MEDLINE | ID: mdl-35882888

RESUMEN

The magnetic properties of NiO/Co/Pt as a function of Co layer thickness were investigated by polar magneto-optical Kerr effect (PMOKE) (magnetometry and microscopy) and Brillouin Light Scattering (BLS) spectroscopy. PMOKE measurements revealed strong surface anisotropy (1.8 mJ/m2) favoring perpendicular magnetic anisotropy and asymmetric domain wall propagation explained by anticlockwise chirality. BLS measurements show that this chirality is induced by strong interfacial Dzyaloshinskii-Moriya interaction (+ 2.0 pJ/m). This is one of the highest values reported so far for Co layers surrounded by different layers. The observed chirality is opposite to what has been found in Co/oxide interfaces. These results and data published earlier, indicate that the strength of interfacial Dzyaloshinskii-Moriya interaction increases with the amount of stoichiometric NiO. Therefore, this work shows that NiO is the source of the interfacial Dzyaloshinskii-Moriya interaction.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Sci Rep Año: 2022 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Reino Unido

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