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Mössbauer Study of Eu_xFe_2-xO₃ (x=0.8 and 0.7)

Journal of Magnetics, Volume 2, Number 2, 30 Jun 1997, Pages 42-45

J. G. Kim(Department of Physics, Hanyang University), E. C. Kim(Department of Physics, Yeungnam University)

Abstract

The microscopic physical properties of nonstoichiometric garnet Eu_xFe_2-xO₃ (x=0.8 and 0.7) have been studied by the methods of X-ray diffraction at room temperature and Mössbauer spectroscopy within the temeperature range of 12-560 K. The X-ray diffraction patterns of the samples show coexistence of dominant garnet and a small portion of unknown crystal phase. But the Mössbauer spectra for the sample of EF08 and EF07 near Néel temperature determined to be equally 549±5K show that there are no any other extra crystal phases within the experimental error. The results of which the temperature dependence of M ssbauer parameters was anlyzed by the spin-wave theory and Debye model are in good agreement with the fact that the sample of EF08 has some vacancies at a-and/or d-sites.

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