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Title: Synthesis, structural and magnetic studies of the double perovskites Ba2CeMO6 (M = Ta, Nb)
Authors: Zhou, QD
Blanchard, PER
Kennedy, BJ
Reynolds, EM
Zhang, Z
Miiller, W
Aitken, JB
Avdeev, M
Jang, LY
Kimpton, JA
Keywords: Perovskite
Phase transformations
Neutron diffraction
X-ray lasers
Issue Date: 16-Jul-2012
Publisher: American Chemical Society
Citation: Zhou, Q. D., Blanchard, P., Kennedy, B. J., Reynolds, E., Zhang, Z., Miiller, W., Aitken, J. B., Avdeev, M., Jang, L. Y., & Kimpton, J. A. (2012). Synthesis, structural and magnetic studies of the double perovskites Ba2CeMO6 (M = Ta, Nb). Chemistry of Materials, 24(15), 2978-2986. doi:10.1021/cm301278a
Abstract: Two Ce(3+) containing double perovskites Ba(2)CeMO(6) (M = Nb and Ta) have been prepared through the use of mildly reducing conditions, and the Ce valence state has been shown to be +3 through Ce L-edge X-ray absorption measurements. Both oxides adopt a monoclinic structure in I2/m at room temperature and undergo two phase transitions upon heating, a discontinuous I2/m -> R (3) over bar and a continuous R (3) over bar -> Fm (3) over barm transition. Analysis of the first order I2/m -> R (3) over bar transitions is impeded by the complex peak shapes and diffuse scattering evident in the synchrotron powder diffraction data because of domain wall effects. © 2012, American Chemical Society.
Gov't Doc #: 4603
ISSN: 0897-4756
Appears in Collections:Journal Articles

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