Ferromagnetic resonance and magnetooptic study of submicron epitaxial Fe(001) stripes

Paz, Elvira and Cebollada Baratas, Federico Alberto and Palomares Simón, Francisco Javier and González Fernández, Jesús María and Martins, J.S. and Santos, N. M. and Sobolev, Nikolai Andreevitch (2012). Ferromagnetic resonance and magnetooptic study of submicron epitaxial Fe(001) stripes. "Journal of Applied Physics", v. 111 (n. 12); p. 123917. ISSN 0021-8979. https://doi.org/10.1063/1.4730136.

Description

Title: Ferromagnetic resonance and magnetooptic study of submicron epitaxial Fe(001) stripes
Author/s:
  • Paz, Elvira
  • Cebollada Baratas, Federico Alberto
  • Palomares Simón, Francisco Javier
  • González Fernández, Jesús María
  • Martins, J.S.
  • Santos, N. M.
  • Sobolev, Nikolai Andreevitch
Item Type: Article
Título de Revista/Publicación: Journal of Applied Physics
Date: 27 June 2012
ISSN: 0021-8979
Volume: 111
Subjects:
Freetext Keywords: electron beam lithography, ferromagnetic resonance, gold, iron, magnesium compounds, magnetic anisotropy, magnetic epitaxial layers, magneto-optical effects, metallic epitaxial layers, nanofabrication, nanolithography, nanomagnetics, nanostructured materials, pulsed laser deposition, vapour phase epitaxial growth
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Física Aplicada a las Tecnologías de la Información [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We present a combined magnetooptic and ferromagnetic resonance study of a series of arrays of single-crystalline Fe stripes fabricated by electron beam lithography on epitaxial Au(001)/Fe(001)/MgO(001) films grown by pulsed laser deposition. The analysis of the films revealed a clear fourfold magnetocrystalline anisotropy, with no significant presence of other anisotropy sources. The use of a large series of arrays, with stripe widths between 140 and 1000 nm and separation between them of either 200 nm or 500 nm, allowed studying their magnetization processes and resonance modes as well as the effects of the dipolar interactions on both. The magnetization processes of the stripes were interpreted in terms of a macrospin approximation, with a good agreement between experiments and calculations and negligible influence of the dipolar interactions. The ferromagnetic resonance spectra evidenced two types of resonances linked to bulk oscillation modes, essentially insensitive to the dipolar interactions, and a third one associated with edge-localized oscillations, whose resonance field is strongly dependent on the dipolar interactions. The ability to produce a high quality, controlled series of stripes provided a good opportunity to achieve an agreement between the experiments and calculations, carried out by taking into account just the Fe intrinsic properties and the morphology of the arrays, thus evidencing the relatively small role of other extrinsic factors.

More information

Item ID: 19069
DC Identifier: http://oa.upm.es/19069/
OAI Identifier: oai:oa.upm.es:19069
DOI: 10.1063/1.4730136
Official URL: http://jap.aip.org/resource/1/japiau/v111/i12/p123917_s1?isAuthorized=no
Deposited by: Memoria Investigacion
Deposited on: 08 Sep 2013 09:16
Last Modified: 21 Apr 2016 17:19
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