Low Temperature Structural Phase Transition in the Perovskite Ba2CaMoO6

Loi T. Nguyen; Robert J. Cava; Allyson M. Fry-Petit

doi:10.1016/j.jssc.2019.06.037

Low Temperature Structural Phase Transition in the Perovskite Ba2CaMoO6

Materials Science 2020-11-03 v1

Authors: Loi T. Nguyen , Robert J. Cava , Allyson M. Fry-Petit

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Abstract

Ba2CaMoO6 was synthesized by solid state method. The crystal structure adopts cubic Fm-3m space group at room temperature with lattice parameters of 8.378231(5) {angstroms}. Upon cooling, Ba2CaMoO6 was determined to have a structural phase transition to tetragonal I4/m (a=5.905763(6) {angstroms} and c=8.38817(1) {angstroms}) around 200 K. The phase transition was probed structurally by synchrotron and neutron diffraction and thermodynamically by specific heat and differential scanning calorimetry measurement. This structural phase transition will deepens our understanding of the perovskite family especially the formation of perovskites that break corner sharing networks.

Keywords

ferroelectric perovskite magnetism phase transitions

Cite

@article{arxiv.2011.00103,
  title  = {Low Temperature Structural Phase Transition in the Perovskite Ba2CaMoO6},
  author = {Loi T. Nguyen and Robert J. Cava and Allyson M. Fry-Petit},
  journal= {arXiv preprint arXiv:2011.00103},
  year   = {2020}
}

Comments

5 figures, 3 tables

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