Determination of the magnetostrictive atomic enviroments in FeCoB alloys

Díaz Fernández, Javier Ignacio and Quirós Fernández, Carlos and Álvarez Prado, Luis Miguel and Aroca Hernández-Ros, Claudio and Ranchal, R. and Ruffoni, Matthew and Pascarelli, Sakura (2012). Determination of the magnetostrictive atomic enviroments in FeCoB alloys. "Physical Review B", v. 85 (n. 13); pp.. ISSN 1098-0121. https://doi.org/10.1103/PhysRevB.85.134437.

Description

Title: Determination of the magnetostrictive atomic enviroments in FeCoB alloys
Author/s:
  • Díaz Fernández, Javier Ignacio
  • Quirós Fernández, Carlos
  • Álvarez Prado, Luis Miguel
  • Aroca Hernández-Ros, Claudio
  • Ranchal, R.
  • Ruffoni, Matthew
  • Pascarelli, Sakura
Item Type: Article
Título de Revista/Publicación: Physical Review B
Date: April 2012
ISSN: 1098-0121
Volume: 85
Subjects:
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

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (990kB) | Preview

Abstract

The atomic environments of Fe and Co involved in the magnetostriction effect in FeCoB alloys have been identified by differential extended x-ray fine structure (DiffEXAFS) spectroscopy. The study, done in amorphous and polycrystalline FeCoB films, demonstrates that the alloys are heterogeneous and that boron plays a crucial role in the origin of their magnetostrictive properties. The analysis of DiffEXAFS in the polycrystalline and amorphous alloys indicates that boron activates magnetostriction when entering as an impurity into octahedral interstitial sites of the Fe bcc lattice, causing its tetragonal distortion. Magnetostriction would be explained then by the relative change in volume when the tetragonal axis of the site is reoriented under an externally applied magnetic field. The experiment demonstrates the extreme sensitivity of DiffEXAFS to characterize magnetostrictive environments that are undetectable in their related EXAFS spectra.

More information

Item ID: 16511
DC Identifier: http://oa.upm.es/16511/
OAI Identifier: oai:oa.upm.es:16511
DOI: 10.1103/PhysRevB.85.134437
Official URL: http://prb.aps.org/abstract/PRB/v85/i13/e134437
Deposited by: Memoria Investigacion
Deposited on: 17 Jul 2013 18:03
Last Modified: 21 Apr 2016 16:49
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM