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Pressure-Induced Spin-Crossover in EuFeO3

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Abstract

EuFeO3 perovskite has been studied by using 57Fe Mössbauer effect and X-ray diffraction under pressures up to 90 GPa and in the temperature range of 4.2–300 K. A high-pressure-induced first-order phase transition is observed in the pressure range of 45–52 GPa as manifested by a discontinuous volume and IS reduction and dramatic changes of the hyperfine interaction parameters. The high-pressure phase of Fe3+ is established as a low-spin state (S=1/2, 2 T 2g ) characterized by spin-spin magnetic relaxation spectra to the lowest temperature. The nature and mechanism of the magnetic relaxation are discussed.

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Authors and Affiliations

  1. School of Physics and Astronomy, Tel Aviv University, 69978, Tel Aviv, Israel

    W. M. Xu, M. P. Pasternak & G. Kh. Rozenberg

  2. MST-10, MS-K764, Los Alamos National Lab, Los Alamos, NM, 87545, USA

    M. P. Pasternak & R. D. Taylor

Authors
  1. W. M. Xu
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  2. M. P. Pasternak
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  3. G. Kh. Rozenberg
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  4. R. D. Taylor
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Correspondence to W. M. Xu.

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Xu, W.M., Pasternak, M.P., Rozenberg, G.K. et al. Pressure-Induced Spin-Crossover in EuFeO3 . Hyperfine Interactions 141, 243–247 (2002). https://doi.org/10.1023/A:1021243128644

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  • DOI: https://doi.org/10.1023/A:1021243128644

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