Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite

Details Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite

2010-07-22

arxiv.org/abs/1007.3864v1

Physics

Condensed Matter

Materials Science

8 pages, 5 figures

Scientific paper

We present a systematic study of the effect of Y doping and hydration level on the structural transformations of BaCeO3 based on anelastic spectroscopy experiments. The temperature of the intermediate transformation between rhombohedral and orthorhombic Imma phases rises with increasing the molar fraction x of Y roughly as (500 K)x in the hydrated state, and is depressed of more than twice that amount after complete dehydration. This is explained in terms of the effect of doping on the average (Ce/Y)-O and Ba-O bond lengths, and of lattice relaxation from O vacancies. The different behavior of the transition to the lower temperature Pnma orthorhombic phase is tentatively explained in terms of progressive flattening of the effective shape of the OH ion and ordering of the O vacancies during cooling.

Affiliated with

Also associated with

No associations

Rating

Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of doping and oxygen vacancies on the octahedral tilt transitions in the BaCeO3 perovskite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-612365