Y1-xLaxVO3: Effects of doping on orbital ordering
- Univ. of Virginia, Charlottesville, VA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States) ; Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Texas, Austin, TX (United States)
For this research, the effects of isovalent doping on orbital ordering in the perovskite Y1-xLaxVO3 were investigated using neutron diffraction and the pair distribution function analysis. YVO3 is a prototype for orbital ordering, exhibiting two consecutive transitions to G-type and C-type ordering with decreasing temperature. Evidence for local orbital ordering above the transition temperature of TOO~200 K is presented, obtained from the temperature dependence of the oxygen-oxygen octahedral correlations. This suggests that locally, G-type orbital ordering is present above the TOO temperature but it is short range. With doping, it is expected that orbital ordering disappears altogether. In conclusion, by 30% of doping, as in Y0.7La0.3VO3, even though no orbital ordering is expected, we find that locally, C-type orbital correlations are most likely present below the magnetic transition temperature TN, allowing for a direct paramagnetic to orbitally ordered/antiferromagnetic transition in this composition.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1265261
- Journal Information:
- Physical Review B, Vol. 90, Issue 21; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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