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Title: Orbital fluctuations and orbital flipping in RVO{sub 3} perovskites.

Abstract

No abstract prepared.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF); Robert A. Welch Foundation
OSTI Identifier:
934904
Report Number(s):
ANL/XSD/JA-62016
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US200814%%564
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. Lett.; Journal Volume: 99; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; FLUCTUATIONS; PEROVSKITES; RESEARCH PROGRAMS

Citation Formats

Yan, Y.-Q., Zhou, J. S., Goodenough, J. B., Ren, Y., Cheng, J. G., Chang, S., Zarestky, J., Garlea, O., Liobet, A., Zhou, H. D., Sui, Y., Su, W. H., McQueeney, R. J., X-Ray Science Division, Iowa State Univ., The Univ. of Texas, Harbin Inst. Technology, and LANL. Orbital fluctuations and orbital flipping in RVO{sub 3} perovskites.. United States: N. p., 2007. Web. doi:10.1103/PhysRevLett.99.197201.
Yan, Y.-Q., Zhou, J. S., Goodenough, J. B., Ren, Y., Cheng, J. G., Chang, S., Zarestky, J., Garlea, O., Liobet, A., Zhou, H. D., Sui, Y., Su, W. H., McQueeney, R. J., X-Ray Science Division, Iowa State Univ., The Univ. of Texas, Harbin Inst. Technology, & LANL. Orbital fluctuations and orbital flipping in RVO{sub 3} perovskites.. United States. doi:10.1103/PhysRevLett.99.197201.
Yan, Y.-Q., Zhou, J. S., Goodenough, J. B., Ren, Y., Cheng, J. G., Chang, S., Zarestky, J., Garlea, O., Liobet, A., Zhou, H. D., Sui, Y., Su, W. H., McQueeney, R. J., X-Ray Science Division, Iowa State Univ., The Univ. of Texas, Harbin Inst. Technology, and LANL. Mon . "Orbital fluctuations and orbital flipping in RVO{sub 3} perovskites.". United States. doi:10.1103/PhysRevLett.99.197201.
@article{osti_934904,
title = {Orbital fluctuations and orbital flipping in RVO{sub 3} perovskites.},
author = {Yan, Y.-Q. and Zhou, J. S. and Goodenough, J. B. and Ren, Y. and Cheng, J. G. and Chang, S. and Zarestky, J. and Garlea, O. and Liobet, A. and Zhou, H. D. and Sui, Y. and Su, W. H. and McQueeney, R. J. and X-Ray Science Division and Iowa State Univ. and The Univ. of Texas and Harbin Inst. Technology and LANL},
abstractNote = {No abstract prepared.},
doi = {10.1103/PhysRevLett.99.197201},
journal = {Phys. Rev. Lett.},
number = 2007,
volume = 99,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • The effect of the average R-site ionic radius <IR> and variance on the orbital and magnetic order in R{sup 3+}-doped YVO{sub 3} was studied in Y{sub 1-x}La{sub x}VO{sub 3} and Y{sub 1-x}(La{sub 0.2337}Lu{sub 0.7663}){sub x}VO{sub 3} with fixed <IR>. The orbital flipping temperature T{sub CG} increases nonlinearly with increasing R-site variance, indicating that the V-O-V bond angle is not the primary driving force stabilizing the C-type orbitally ordered phase. The suppressed thermal conductivity in the G-type orbitally ordered phase signals some remaining orbital randomness that is enhanced by t{sup 2} and et hybridization in {sup 3}T{sub 1g} site symmetry.
  • No abstract prepared.
  • No abstract prepared.
  • The effect of the average A-site ionic radius hIRi and variance on the orbital and magnetic order in R3+-doped YVO3 was studied in Y1-xLaxVO3 and Y1-x(La0.2337Lu0.7663)xVO3 with fixed . The orbital flipping temperature T_CG increases nonlinearly with increasing R-site variance, indicating that the V-O-V bond angle is not the primary driving force stabilizing the C-type orbitally ordered phase. The suppressed thermal conductivity in the G-type orbitally ordered phase signals some remaining orbital randomness that is enhanced by t2 and et hybridization in 3T_1g site symmetry.
  • We report evidence for the phase coexistence of orbital orderings of different symmetry in RVO{sub 3} compounds with intermediate-size rare earths. Through a study by high-resolution x-ray powder diffraction and thermal expansion, we show that the competing orbital orderings are associated with the magnitude of the VO{sub 6} octahedral tilting and magnetic exchange striction in these compounds and that the phase-separated state is stabilized by lattice strains.