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Effect of electric field on neutron scattering in lead magnoniobate

  • Magnetism and Ferroelectricity
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Abstract

The temperature dependence of the intensity of the Bragg and the transverse component of quasi-elastic neutron scattering from the single-crystal model relaxor PbMg1/3Nb2/3O3 (PMN) has been studied for various applied electric fields. It is shown that application of a field E>E th ≈1.6 kV/cm increases the elastic scattering intensity and reduces the intensity of the transverse diffuse-scattering component and that, below 230 K and for E>6 kV/cm, the elastic-scattering intensity saturates while the temperature-dependent part of the transverse diffuse-scattering component becomes practically suppressed. The measured temperature and field dependences of the intensity of type (h00) and (hh0) Bragg reflections provide supportive evidence both for the presence of considerable lead-ion displacements relative to the ideal perovskite sites and for the existence in strong electric fields of an induced transition to the ferroelectric phase below 250 K.

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Authors and Affiliations

  1. A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia

    S. B. Vakhrushev, A. A. Naberezhnov & N. M. Okuneva

  2. Joint Institute for Nuclear Research, 141980, Dubna, Russia

    B. N. Savenko

Authors
  1. S. B. Vakhrushev
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  2. A. A. Naberezhnov
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  3. N. M. Okuneva
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  4. B. N. Savenko
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Fiz. Tverd. Tela (St. Petersburg) 40, 1905–1910 (October 1998)

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Vakhrushev, S.B., Naberezhnov, A.A., Okuneva, N.M. et al. Effect of electric field on neutron scattering in lead magnoniobate. Phys. Solid State 40, 1728–1733 (1998). https://doi.org/10.1134/1.1130645

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  • DOI: https://doi.org/10.1134/1.1130645

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