http://www.cnr.it/ontology/cnr/individuo/prodotto/ID280640

Collective spin waves on a nanowire array with step-modulated thickness (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Collective spin waves on a nanowire array with step-modulated thickness (Articolo in rivista) (literal)

Anno

2014-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1088/0022-3727/47/10/105003 (literal)

Alternative label

Gubbiotti G.; Kostylev M.; Tacchi S.; Madami M.; Carlotti G.; Ding J.; Adeyeye A.O.; Zighem F.; Stashkevich A.A.; Ivanov E.; Samarin S. (2014)
Collective spin waves on a nanowire array with step-modulated thickness
in Journal of physics. D, Applied physics (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Gubbiotti G.; Kostylev M.; Tacchi S.; Madami M.; Carlotti G.; Ding J.; Adeyeye A.O.; Zighem F.; Stashkevich A.A.; Ivanov E.; Samarin S. (literal)

Pagina inizio

105003 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.scopus.com/inward/record.url?eid=2-s2.0-84894463631&partnerID=q2rCbXpz (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

47 (literal)

Rivista

Journal of physics. D, Applied physics (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

8 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

10 (literal)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Istituto Officina Dei Materiali Del Consiglio Nazionale Delle Ricerche (IOM-CNR), Sede di Perugia, C/o Dipartimento di Fisica, Via A. Pascoli, I-06123 Perugia, Italy; Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, I-06123 Perugia, Italy; Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering drive 3, Singapore-117576, Singapore; LSPM CNRS (UPR 3407), Université Paris 13, Sorbonne Paris Cité, 93430 Villetaneuse, France; School of Physics M013, University of Western Australia, 35 Stirling Hwy, WA 6009, Australia (literal)

Titolo

Collective spin waves on a nanowire array with step-modulated thickness (literal)

Abstract

It is shown experimentally that collective Bloch spin waves are able to propagate in a dense periodic array of nanowires with step-modulated thickness along the periodicity direction. The spin wave dispersion (frequency versus wave vector k) was measured using the Brillouin light scattering technique by sweeping the wave vector perpendicularly to the wire length. Remarkably, the mode measured at the lowest frequency exhibits an oscillating dispersion and its frequency is up-shifted with respect to the homogeneous-thickness wires of the same width. The modes located at higher frequencies have negligible dependencies on the wave number, i.e. are practically dispersionless. Complementary ferromagnetic resonance measurements enabled us to independently measure the whole set of modes at k = 0, showing a good agreement with the Brillouin light scattering data. These results have been successfully reproduced in a numerical simulation employing a two-dimensional Green's function description of the dynamic dipole field of the precessing magnetization. The theory also allowed visualizing the non-trivial distribution of dynamic magnetization across the wire cross-section and estimating the Brillouin light scattering cross-section. The analysis of these intensities suggests complicated magneto-optical coupling between the light and the dynamic magnetization in the arrays of nanowires with step-modulated thickness. This work can stimulate the design, tailoring, and characterization of three-dimensional magnonic crystals. © 2014 IOP Publishing Ltd. (literal)

Prodotto di