Magnetic Normal Mode Calculations in Big Systems: A Highly Scalable Dynamical Matrix Approach Applied to a Fibonacci-Distorted Artificial Spin Ice

Autor: Loris Giovannini, Barry W. Farmer, Justin S. Woods, Ali Frotanpour, Lance E. De Long, Federico Montoncello

Publikováno v: Magnetochemistry, Vol 7, Iss 3, p 34 (2021)

We present a new formulation of the dynamical matrix method for computing the magnetic normal modes of a large system, resulting in a highly scalable approach. The motion equation, which takes into account external field, dipolar and ferromagnetic ex

Externí odkaz: https://doaj.org/article/de80f93e286b4deaa594a3feb5c746ef

Dual Band Magnonic Crystals: Model System and Basic Spin Wave Dynamics

Autor: Federico Montoncello, Loris Giovannini

Publikováno v: Advances in Materials Science and Engineering, Vol 2016 (2016)

We investigate a special design of two-dimensional magnonic crystal, consisting of two superimposed lattices with different lattice constants, such that spin waves (SWs) can propagate either in one or the other sublattice, depending on which of the t

Externí odkaz: https://doaj.org/article/5b1ff001ab2b417885a1416cb23ccf5e

Magnetization dynamics of a Fibonacci-distorted kagome artificial spin ice

Autor: Federico Montoncello, Justin Woods, Loris Giovannini, Lance E. De Long, Barry Farmer, Ali Frotanpour, Amrit P. Kaphle

We present results of ferromagnetic resonance (FMR) experiments and micromagnetic simulations for a distorted, two-dimensional (2D) kagome artificial spin ice. The distorted structure is created by continuously modulating the 2D primitive lattice tra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29e4f95785807402a90d7709bdb9500e
http://hdl.handle.net/11392/2434181

Angular-dependent spin dynamics of a triad of permalloy macrospins

Autor: Federico Montoncello, Axel Hoffmann, Wonbae Bang, Loris Giovannini, Matthias B. Jungfleisch, John B Ketterson

Publikováno v: Physical Review B. 99

We experimentally and theoretically characterize the angular-dependent microwave response of three-macrospin-vertex structures that can serve as a node in various spin ice lattices. The macrospins consist of patterned permalloy thin films with an ell

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::989b9923cc575222a3726f139afd9dab
https://doi.org/10.1103/physrevb.99.014415

Spin wave dispersion and intensity correlation in width-modulated nanowire arrays: A Brillouin light scattering study

Autor: A. O. Adeyeye, Federico Montoncello, L. L. Xiong, Loris Giovannini, Gianluca Gubbiotti

Publikováno v: Journal of applied physics 124 (2018). doi:10.1063/1.5047393
info:cnr-pdr/source/autori:Gubbiotti G.; Xiong L.L.; Montoncello F.; Giovannini L.; Adeyeye A.O./titolo:Spin wave dispersion and intensity correlation in width-modulated nanowire arrays: A Brillouin light scattering study/doi:10.1063%2F1.5047393/rivista:Journal of applied physics/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:124

Using Brillouin light scattering spectroscopy and dynamical matrix method calculations, we study collective spin waves in dense arrays of periodically double-side width-modulated Permalloy nanowires. Width modulation is achieved by creating a sequenc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb55f5066eb382ee1dc7816cafb88877