@article{Kharlan2024,
title = {Tunable magnonic crystal in a hybrid superconductor-ferrimagnet nanostructure},
author = {Yulia Kharlan and Krzysztof Szulc and Jarosław W Kłos and Grzegorz Centała},
url = {https://doi.org/10.1038/s41598-024-75492-0},
doi = {10.1038/s41598-024-75492-0},
issn = {2045-2322},
year = {2024},
date = {2024-10-26},
journal = {Scientific Reports},
volume = {14},
number = {1},
pages = {25594},
abstract = {One of the most intriguing properties of magnonic systems is their reconfigurability, where an external magnetic field alters the static magnetic configuration to influence magnetization dynamics. In this paper, we present an alternative approach to tunable magnonic systems. We studied theoretically and numerically a magnonic crystal induced within a uniform magnetic layer by a periodic magnetic field pattern created by the sequence of superconducting strips. We showed that the spin-wave spectrum can be tuned by the inhomogeneous stray field of the superconductor in response to a small uniform external magnetic field. Additionally, we demonstrated that modifying the width of superconducting strips and separation between them leads to the changes in the internal field which are unprecedented in conventional magnonic structures. The paper presents the results of semi-analytical calculations for realistic structures, which are verified by finite-element method computations.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{CENTALA2023171254,
title = {Shaping magnetization dynamics in a planar square dot by adjusting its surface anisotropy},
author = {Grzegorz Centała and Jarosław W. Kłos},
url = {https://www.sciencedirect.com/science/article/pii/S0304885323009046},
doi = {https://doi.org/10.1016/j.jmmm.2023.171254},
issn = {0304-8853},
year = {2023},
date = {2023-09-22},
journal = {Journal of Magnetism and Magnetic Materials},
volume = {587},
pages = {171254},
abstract = {A planar square dot is one of the simplest structures confined to three dimensions. Despite its geometrical simplicity, the description of the spin wave modes in this structure is not trivial due to the competition of dipolar and exchange interactions. An additional factor that makes this description challenging are the boundary conditions depend both on non-local dipolar interactions and local surface parameters such as surface anisotropy. In the presented work, we showed how the surface anisotropy applied at the lateral faces of the dot can tune the frequency of fundamental mode in the planar CoFeB dot, magnetized in an out-of-plane direction. Moreover, we analyzed the spin wave profile of the fundamental mode and the corresponding dynamic stray field. We showed that the asymmetric application of surface anisotropy produces an asymmetric profile of dynamic stray field for square dot and can be used to tailor inter-dot coupling. The calculations were performed with the use of the finite-element method.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{centala_compact_2023,
title = {Compact localized states in magnonic Lieb lattices},
author = {Grzegorz Centała and Jarosław W. Kłos},
url = {https://www.nature.com/articles/s41598-023-39816-w},
doi = {10.1038/s41598-023-39816-w},
issn = {2045-2322},
year = {2023},
date = {2023-08-04},
urldate = {2023-08-04},
journal = {Scientific Reports},
volume = {13},
number = {1},
pages = {12676},
abstract = {Lieb lattice is one of the simplest bipartite lattices, where compact localized states (CLS) are observed. This type of localization is induced by the peculiar topology of the unit cell, where the modes are localized only on selected sublattices due to the destructive interference of partial waves. We demonstrate the possibility of magnonic Lieb lattice realization, where flat bands and CLS can be observed in the planar structure of sub-micron in-plane sizes. Using forward volume configuration, the Ga-doped YIG layer with cylindrical inclusions (without Ga content) arranged in a Lieb lattice with 250 nm period was investigated numerically (finite-element method). The structure was tailored to observe, for a lowest magnonic bands, the oscillatory and evanescent spin waves in inclusions and matrix, respectively. Such a design reproduces the Lieb lattice of nodes (inclusions) coupled to each other by the matrix with the CLS in flat bands.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{doi:10.1021/acs.nanolett.0c03692,
title = {The Interaction between Surface Acoustic Waves and Spin Waves: The Role of Anisotropy and Spatial Profiles of the Modes},
author = {Nandan K. P. Babu and Aleksandra Trzaskowska and Piotr Graczyk and Grzegorz Centała and Szymon Mieszczak and Hubert Głowiński and Miłosz Zdunek and Sławomir Mielcarek and Jarosław W. Kłos},
url = {https://doi.org/10.1021/acs.nanolett.0c03692},
doi = {10.1021/acs.nanolett.0c03692},
year = {2021},
date = {2021-01-01},
journal = {Nano Lett.},
volume = {21},
number = {2},
pages = {946-951},
abstract = {The interaction between different types of wave excitation in hybrid systems is usually anisotropic. Magnetoelastic coupling between surface acoustic waves and spin waves strongly depends on the direction of the external magnetic field. However, in the present study we observe that even if the orientation of the field is supportive for the coupling, the magnetoelastic interaction can be significantly reduced for surface acoustic waves with a particular profile in the direction normal to the surface at distances much smaller than the wavelength. We use Brillouin light scattering for the investigation of thermally excited phonons and magnons in a magnetostrictive CoFeB/Au multilayer deposited on a Si substrate. The experimental data are interpreted on the basis of a linearized model of interaction between surface acoustic waves and spin waves.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}