| Autor: |
Tacchi, S., Troncoso, R. E., Ahlberg, M., Gubbiotti, G., Madami, M., Åkerman, J., Landeros, P. |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 118, 147201 (2017) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.118.147201 |
| Popis: |
We report the observation of a Pt layer thickness dependence on the induced interfacial Dzyaloshinskii-Moriya interaction in ultra-thin Pt($d_{\text{Pt}}$)/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 non-reciprocity of spin-waves in the ferromagnet. The magnitude of the induced Dzyaloshinskii-Moriya coupling is found to saturate to a value $0.45$ mJ$/$m${}^2$ for Pt thicknesses larger than $\sim 2$ nm. The experimental results are explained by analytical calculations based on the 3-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. |
| Databáze: |
arXiv |
| Externí odkaz: |
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