Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

J. Agostinho Moreira; A. Almeida; J. Oliveira; V. H. Rodrigues; M. M. R. Costa; P. B. Tavares; P. Bouvier; M. Guennou; J. Kreisel

Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

Strongly Correlated Electrons 2011-11-22 v1

Authors: J. Agostinho Moreira , A. Almeida , J. Oliveira , V. H. Rodrigues , M. M. R. Costa , P. B. Tavares , P. Bouvier , M. Guennou , J. Kreisel

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Abstract

We present a study of the effect of very high pressure on the orthorhombic perovskite GdMnO3 by Raman spectroscopy and synchrotron x-ray diffraction up to 53.2 GPa. The experimental results yield a structural and insulator-to-metal phase transition close to 50 GPa, from an orthorhombic to a metrically cubic structure. The phase transition is of first order with a pressure hysteresis of about 6 GPa. The observed behavior under very high pressure might well be a general feature in rare-earth manganites.

Keywords

GdMnO3 high pressure insulator-to-metal transition Raman spectroscopy synchrotron x-ray diffraction rare-earth manganites

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@article{arxiv.1111.4855,
  title  = {Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3},
  author = {J. Agostinho Moreira and A. Almeida and J. Oliveira and V. H. Rodrigues and M. M. R. Costa and P. B. Tavares and P. Bouvier and M. Guennou and J. Kreisel},
  journal= {arXiv preprint arXiv:1111.4855},
  year   = {2011}
}

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4 pages, 3 figures and 2 tables

Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

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