%0 Journal Article %1 Krawczyk2011 %A Krawczyk, M. %A Mamica, S. %A Klos, J. W. %A Romero-Vivas, J. %A Mruczkiewicz, M. %A Barman, A. %D 2011 %J J. Appl. Phys. %K %N 11 %P 113903 %R 10.1063/1.3586249 %T Calculation of spin wave spectra in magnetic nanograins and patterned multilayers with perpendicular anisotropy %V 109 %X We study spin-wave excitations in multilayered magnetic nanograins composed of a stack of planes with perpendicular magnetic anisotropy. The inhomogeneity is modeled through the multiple repetition of a unit cell composed of layers of two different magnetic materials. The magnetic inhomogeneity along the central axis is found to split the frequency spectrum of magnetostatic excitations into two bands, while into the number of bands in the spectrum of exchange spin waves. We show that this difference in behavior is a result of the underlying long-and short-range interactions, respectively. We describe a way of increasing the role of the dipolar interactions in the formation of magnonic bands in patterned magnetic multilayers with perpendicular anisotropy, which can allow one to obtain ferromagnetic resonance spectra with two strong absorption peaks in low and high frequencies up to the sub-THz range. Our findings open a new area for modeling the spin-wave spectra of patterned magnetic multilayers with potential applications, and for studying the role of the microscopic magnetic structure in forming spin-wave spectra. (C) 2011 American Institute of Physics. doi:10.1063/1.3586249

@article{Krawczyk2011, abstract = {We study spin-wave excitations in multilayered magnetic nanograins composed of a stack of planes with perpendicular magnetic anisotropy. The inhomogeneity is modeled through the multiple repetition of a unit cell composed of layers of two different magnetic materials. The magnetic inhomogeneity along the central axis is found to split the frequency spectrum of magnetostatic excitations into two bands, while into the number of bands in the spectrum of exchange spin waves. We show that this difference in behavior is a result of the underlying long-and short-range interactions, respectively. We describe a way of increasing the role of the dipolar interactions in the formation of magnonic bands in patterned magnetic multilayers with perpendicular anisotropy, which can allow one to obtain ferromagnetic resonance spectra with two strong absorption peaks in low and high frequencies up to the sub-THz range. Our findings open a new area for modeling the spin-wave spectra of patterned magnetic multilayers with potential applications, and for studying the role of the microscopic magnetic structure in forming spin-wave spectra. (C) 2011 American Institute of Physics. [doi:10.1063/1.3586249]}, added-at = {2011-10-24T23:16:24.000+0200}, author = {Krawczyk, M. and Mamica, S. and Klos, J. W. and Romero-Vivas, J. and Mruczkiewicz, M. and Barman, A.}, biburl = {https://www.bibsonomy.org/bibtex/231738c27f522c451fc7e15e77f5da3f2/jabreftest}, doi = {10.1063/1.3586249}, groups = {public}, interhash = {00de3650dfba57f38f5ac1982cbe53fd}, intrahash = {31738c27f522c451fc7e15e77f5da3f2}, journal = {J. Appl. Phys.}, keywords = {}, month = {#jun#}, number = 11, pages = 113903, sn = {0021-8979}, tc = {0}, timestamp = {2011-10-24T23:16:24.000+0200}, title = {Calculation of spin wave spectra in magnetic nanograins and patterned multilayers with perpendicular anisotropy}, username = {jabreftest}, ut = {WOS:000292214700089}, volume = 109, year = 2011, z9 = {0} }