@article{JANARDHANAN2024171570,
title = {Spin wave dynamics in CoFeB bilayers with wedged Au spacer},
author = {Sreedevi Janardhanan and Sławomir Mielcarek and Hubert Głowiński and Daniel Kiphart and Piotr Kuświk and Aleksandra Trzaskowska},
url = {https://www.sciencedirect.com/science/article/pii/S0304885323012209},
doi = {https://doi.org/10.1016/j.jmmm.2023.171570},
issn = {0304-8853},
year = {2024},
date = {2024-01-01},
journal = {Journal of Magnetism and Magnetic Materials},
volume = {589},
pages = {171570},
abstract = {This paper presents the experimental studies of ferromagnetic layers separated by a heavy metal wedge. The studied system consists of two thin layers of CoFeB separated by a wedged Au spacer. By performing Brillouin light scattering measurements of the spin-wave dispersion relations, and dependences on the magnetic field, we extract magnetic parameters in the studied ferromagnetic layers as a function of heavy metal thickness. We concluded that for thin ferromagnetic double layers, the magnetic properties strongly depend on the thickness of the wedge gold layer spacer. In particular, the presence of perpendicular magnetic anisotropy diminishes as the thickness of the magnetic material is increased, and at the spacers thicker than 2.5 nm the dynamic coupling between propagating spin waves in both layers is negligible. These findings have potential advantages for the development of future spintronic devices.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Janardhanan2023b,
title = {Investigation of spin wave dynamics in Au/CoFeB/Au multilayers with perpendicular magnetic anisotropy},
author = {Sreedevi Janardhanan and Sławomir Mielcarek and Hubert G{ł}owi{ń}ski and Mateusz Kowacz and Piotr Ku{ś}wik and Maciej Krawczyk and Aleksandra Trzaskowska},
url = {https://doi.org/10.1038/s41598-023-49859-8},
doi = {10.1038/s41598-023-49859-8},
issn = {2045-2322},
year = {2023},
date = {2023-12-15},
journal = {Scientific Reports},
volume = {13},
number = {1},
pages = {22494},
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.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{JANARDHANAN2023171209,
title = {High-resolution Brillouin light scattering study on Ti/Au/Co/Ni multilayer},
author = {Sreedevi Janardhanan and Sławomir Mielcarek and Piotr Kuświk and Maciej Krawczyk and Aleksandra Trzaskowska},
url = {https://www.sciencedirect.com/science/article/pii/S0304885323008594},
doi = {https://doi.org/10.1016/j.jmmm.2023.171209},
issn = {0304-8853},
year = {2023},
date = {2023-09-01},
journal = {Journal of Magnetism and Magnetic Materials},
volume = {586},
pages = {171209},
abstract = {The topic of this paper addresses the Brillouin light scattering (BLS) study of the spin-wave and surface acoustic wave dynamics in the multilayer consisting of Ti/Au/Co/Ni deposited on Si substrate. We make the quantitative analysis of spin-wave frequency under a range of wave vectors to determine the dispersion relation and to study the effect of the magnetic field. These findings were correlated with theoretical models to determine the magnetic system parameters, such as magnetization, Lande g factor, exchange stiffness constant etc. In addition to this, we have conducted finite element method based simulations to understand the nature of surface phonons and to determine the elastic tensor parameters for the Ti/Au/Co/Ni layer from the fitting of simulation results with the experiment data points.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}