Volume expansion contribution to the magnetism of atomically disordered intermetallic alloys

J. Nogués, E. Apiñaniz, J. Sort, M. Amboage, M. d’Astuto, O. Mathon, R. Puzniak, I. Fita, J. S. Garitaonandia, S. Suriñach, J. S. Muñoz, M. D. Baró, F. Plazaola, and F. Baudelet
Phys. Rev. B 74, 024407 – Published 11 July 2006
PDFHTMLExport Citation
Abstract
Authors
Article Text
  • INTRODUCTION
  • EXPERIMENTAL
  • RESULTS
  • DISCUSSION
  • CONCLUSIONS
  • ACKNOWLEDGEMENTS
    • References

    Abstract

    The origin of magnetism in atomically disordered transition-metal–nonmagnetic (i.e., FeAl) alloys has been investigated by dichroism and diffraction measurements at high pressure and by band structure calculations. The results show that, in contrast to earlier studies, besides the effects of the local environment of the magnetic ions, disorder-induced lattice changes play a key role in the magnetic properties of these systems. We demonstrate experimentally and theoretically that about 35–45% of the magnetic moment of Fe60Al40 alloys arises from lattice expansion effects induced during the disordering process. Such large effects in Fe60Al40 could actually be related to the moment-volume instability observed in these alloys.

    • Figure
    • Figure
    • Received 24 April 2006

    DOI:https://doi.org/10.1103/PhysRevB.74.024407

    ©2006 American Physical Society

    Authors & Affiliations

    J. Nogués1,*, E. Apiñaniz2, J. Sort1, M. Amboage3, M. d’Astuto4, O. Mathon3, R. Puzniak5, I. Fita5,6, J. S. Garitaonandia7, S. Suriñach8, J. S. Muñoz8, M. D. Baró8, F. Plazaola9, and F. Baudelet4,10

    • 1Institució Catalana de Recerca i Estudis Avançats (ICREA) and Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
    • 2Fisika Aplikatua I Saila, Ingenieritza Goi Eskola Teknikoa, UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao, Spain
    • 3ESRF, Boîte Postale 220, 6 Rue Horowitz, 38043 Grenoble Cedex 9, France
    • 4Institut de Minéralogie et Physique des Milieux Condensés—CNRS UMR 7590, Université P. et M. Curie, 140 rue de Lourmel, 75015 Paris, France
    • 5Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, 02-668 Warsaw, Poland
    • 6Donetsk Institute for Physics and Technology, National Academy of Sciences, R. Luxemburg strasse 72, 83114 Donetsk, Ukraine
    • 7Fisika Aplikatua II Saila, Zientzia eta Teknologia Fakultatea, UPV/EHU, Postakutxatila 644, 48080 Bilbao, Spain
    • 8Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
    • 9Elektrika eta Elektronika Saila, Zientzia eta Teknologia Fakultatea, UPV/EHU, Postakutxatila 644, 48080 Bilbao, Spain
    • 10Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, Boîte Postale 48, 91192 Gif-sur-Yvette Cedex, France

    • *Electronic address: Josep.Nogues@uab.es

    Article Text (Subscription Required)

    Click to Expand

    References (Subscription Required)

    Click to Expand
    Issue

    Vol. 74, Iss. 2 — 1 July 2006

    Reuse & Permissions
    Access Options
    Author publication services for translation and copyediting assistance advertisement

    Authorization Required

    Log In
    Other Options
    ×

    Download & Share

    PDFExportReuse & PermissionsCiting Articles (58)
    ×

    Images

    ×

    Sign up to receive regular email alerts from Physical Review B

    Log In

    Cancel
    ×

    Search

    Article Lookup

    Paste a citation or DOI
    Enter a citation
    ×