Role of rare-earth ionic radii on the spin-phonon coupling in multiferroic ordered double perovskites

R. B. Macedo Filho; D. A. B. Barbosa; H. Reichlova; X. Marti; A. Menezes; A. P. Ayala; C. W. A. Paschoal

Role of rare-earth ionic radii on the spin-phonon coupling in multiferroic ordered double perovskites

Materials Science 2014-09-22 v2

Authors: R. B. Macedo Filho , D. A. B. Barbosa , H. Reichlova , X. Marti , A. Menezes , A. P. Ayala , C. W. A. Paschoal

Abstract

In this paper we investigated the influence of the rare-earth ionic radii on the spin-phonon coupling in RE2NiMnO6 double perovskites by Raman spectroscopy. Spin-phonon in dense Nd2NiMnO6 and Gd2NiMnO6 ceramics were investigated by Raman spectroscopy at low temperatures. The magnitude of the coupling observed in comparison with other isostructural compounds shows that it is not influenced by the rare-earth ionic radius, as well as the deviation of the position of the stretching phonon in the ferromagnetic phase with relation to the anharmonic contributions follows a power law.

Keywords

spin-phonon coupling multiferroics double perovskites rare-earth ionic radii Raman spectroscopy

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@article{arxiv.1409.3548,
  title  = {Role of rare-earth ionic radii on the spin-phonon coupling in multiferroic ordered double perovskites},
  author = {R. B. Macedo Filho and D. A. B. Barbosa and H. Reichlova and X. Marti and A. Menezes and A. P. Ayala and C. W. A. Paschoal},
  journal= {arXiv preprint arXiv:1409.3548},
  year   = {2014}
}

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13 pages, 3 Figures

Role of rare-earth ionic radii on the spin-phonon coupling in multiferroic ordered double perovskites

Abstract

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