ICAME 2003 pp 389-394 | Cite as

High Pressure Mössbauer Studies on FCC Fe53Ni47 Alloy

  • Y. A. Abdu
  • H. Annersten
  • L. S. Dubrovinsky
  • N. A. Dubrovinskaia
Conference paper

Abstract

High pressure 57Fe Mössbauer spectroscopy measurements (up to ~41 GPa at room temperature) have been carried out for investigating the magnetic properties of γ (fcc) 57Fe53Ni47 alloy using diamond anvil cell (DAC) technique. The Mössbauer spectrum at 0 GPa shows a six line magnetic pattern with broad outer peaks and an average hyperfine field of ~31 T characteristic of a disordered alloy. In the pressure range (2 < P < 20 GPa) we observe Mössbauer spectra with additional low hyperfine field component resembling spectra of γ (fcc) Fe—Ni Invar alloys (30–40 at % Ni). Our data indicate a pressure induced Invar effect for 57Fe53Ni47 alloy at ~7–12 GPa. Above 20 GPa the hyperfine field breaks down and the alloy becomes non-magnetic showing only a single line Mössbauer spectrum.

Key words

Mössbauer spectroscopy high pressure Fe—Ni alloys Invar 

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Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • Y. A. Abdu
    • 1
  • H. Annersten
    • 1
  • L. S. Dubrovinsky
    • 2
  • N. A. Dubrovinskaia
    • 2
  1. 1.Department of Earth SciencesUppsala UniversityUppsalaSweden
  2. 2.Bayerisches GeoinstitutUniversität BayreuthGermany

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