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Hyperfine Interactions

, Volume 41, Issue 1, pp 689–692 | Cite as

A conversion electron Mössbauer spectroscopy study of pulsed laser treatment at α-Fe2O3/H2O interface

  • Sushama Joshi
  • D. M. Phase
  • S. M. Kanetkar
  • S. V. Ghaisas
  • S. B. Ogale
  • V. G. Bhide
Surface Phenomena Catalysis

Abstract

Magnetite (Fe3O4) has been synthesized for the first time by using pulsed ruby laser induced reactive quenching process at α-Fe2O3/H2O interface. Iron foils (99.99% pure) were oxidised at 450° C for four hours to form a thick layer of α-Fe2O3 on it. These oxidised samples were immersed in water and then treated with ruby laser pulses (λ=0.694 μm, pulse width = 30 ns, energy density = 10 J/cm2). The conversion electron Mössbauer spectroscopy (CEMS) has been used to characterize the laser induced surface modifications. It is shown that laser treated samples show the formation of Fe3O4 phase along with FeO. The stability of magnetite phase in laser treated sample against thermal treatment is also studied by investigating the changes in hyperfine interaction parameters upon vacuum annealing at 300° C.

Keywords

Fe3O4 Magnetite Hyperfine Interaction Oxidise Sample Vacuum Annealing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© J.C. Baltzer A.G., Scientific Publishing Company 1988

Authors and Affiliations

  • Sushama Joshi
    • 1
  • D. M. Phase
    • 1
  • S. M. Kanetkar
    • 1
  • S. V. Ghaisas
    • 1
  • S. B. Ogale
    • 1
  • V. G. Bhide
    • 2
  1. 1.Department of PhysicsUniversity of PoonaPuneIndia
  2. 2.School of Energy StudiesUniversity of PoonaPuneIndia

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