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Janardhanan S, Mielcarek S, Głowiński H, Kowacz M, Kuświk P, Krawczyk M, Trzaskowska A. Investigation of spin wave dynamics in Au/CoFeB/Au multilayers with perpendicular magnetic anisotropy. Sci Rep 2023; 13:22494. [PMID: 38110449 PMCID: PMC10728143 DOI: 10.1038/s41598-023-49859-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 12/12/2023] [Indexed: 12/20/2023] Open
Abstract
We have carried out an experimental investigation of the spin-wave dynamics in the Au/CoFeB/Au multilayer consisting of a ferromagnetic film with thicknesses of 0.8, 0.9 and 1.0 nm. We employed the Brillouin light scattering spectroscopy to measure the frequency of the spin waves in dependence on the wave vector. Additionally, we characterized the samples by ferromagnetic resonance measurements. We found that the considered samples exhibit perpendicular magnetic anisotropy with low damping, indicating small pumping effects. Furthermore, we found a nonreciprocal dispersion relation pointing at a non-negligible Dzyaloshinskii-Moriya interaction. These results make the Au/CoFeB/Au multilayer a compelling subject for further analysis and as a potential material for future applications within magnonics.
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Affiliation(s)
- S Janardhanan
- ISQI, Faculty of Physics, Adam Mickiewicz University, Poznan, Poland.
| | - S Mielcarek
- ISQI, Faculty of Physics, Adam Mickiewicz University, Poznan, Poland
| | - H Głowiński
- Institute of Molecular Physics, Polish Academy of Science, Poznan, Poland
| | - M Kowacz
- Institute of Molecular Physics, Polish Academy of Science, Poznan, Poland
| | - P Kuświk
- Institute of Molecular Physics, Polish Academy of Science, Poznan, Poland
| | - M Krawczyk
- ISQI, Faculty of Physics, Adam Mickiewicz University, Poznan, Poland
| | - A Trzaskowska
- ISQI, Faculty of Physics, Adam Mickiewicz University, Poznan, Poland
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Kowacz M, Mazalski P, Sveklo I, Matczak M, Anastaziak B, Guzowska U, Dhiman AK, Madej E, Maziewski A, Kuświk P, Gieniusz R. Strong interfacial Dzyaloshinskii-Moriya induced in Co due to contact with NiO. Sci Rep 2022; 12:12741. [PMID: 35882888 PMCID: PMC9325689 DOI: 10.1038/s41598-022-16997-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 07/19/2022] [Indexed: 11/09/2022] Open
Abstract
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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Affiliation(s)
- M Kowacz
- Institute of Molecular Physics Polish Academy of Sciences, Poznań, Poland
| | - P Mazalski
- Faculty of Physics, University of Bialystok, Białystok, Poland. .,Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków, Poland.
| | - I Sveklo
- Faculty of Physics, University of Bialystok, Białystok, Poland
| | - M Matczak
- Faculty of Physics, University of Bialystok, Białystok, Poland
| | - B Anastaziak
- Institute of Molecular Physics Polish Academy of Sciences, Poznań, Poland.,NanoBioMedical Centre, Adam Mickiewicz University in Poznan, Poznań, Poland
| | - U Guzowska
- Faculty of Physics, University of Bialystok, Białystok, Poland
| | - A K Dhiman
- Faculty of Physics, University of Bialystok, Białystok, Poland
| | - E Madej
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Kraków, Poland
| | - A Maziewski
- Faculty of Physics, University of Bialystok, Białystok, Poland
| | - P Kuświk
- Institute of Molecular Physics Polish Academy of Sciences, Poznań, Poland.
| | - R Gieniusz
- Faculty of Physics, University of Bialystok, Białystok, Poland
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