{"title":"Effective dynamic susceptibility of a one-dimensional array of ferromagnetic wires","authors":"R. Zivieri","doi":"10.1109/METAMATERIALS.2014.6948541","DOIUrl":null,"url":null,"abstract":"In this paper the calculation of the effective dynamic susceptibility for a one-dimensional array of permalloy rectangular nanowires periodic along the in-plane x direction is presented. The external magnetic field is assumed aligned along the long side of the wires (y direction) and the in-plane Bloch wave vector is along the wires width (x direction). The calculation is performed by means of a finite-difference micromagnetic approach, the Lagrangian-based dynamical matrix method. It is shown that the excited spin-wave mode is always the quasi-uniform or fundamental mode of the spectrum. This spin excitation has a non-uniform amplitude along the wire width due to confinement with no nodal planes and can be regarded as the metamaterial wave of the one-dimensional periodic system.","PeriodicalId":151955,"journal":{"name":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","volume":"7 1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/METAMATERIALS.2014.6948541","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
In this paper the calculation of the effective dynamic susceptibility for a one-dimensional array of permalloy rectangular nanowires periodic along the in-plane x direction is presented. The external magnetic field is assumed aligned along the long side of the wires (y direction) and the in-plane Bloch wave vector is along the wires width (x direction). The calculation is performed by means of a finite-difference micromagnetic approach, the Lagrangian-based dynamical matrix method. It is shown that the excited spin-wave mode is always the quasi-uniform or fundamental mode of the spectrum. This spin excitation has a non-uniform amplitude along the wire width due to confinement with no nodal planes and can be regarded as the metamaterial wave of the one-dimensional periodic system.