TY - JOUR
T1 - Y1-xLaxVO3
T2 - Effects of doping on orbital ordering
AU - Yano, S.
AU - Louca, Despina
AU - Neuefeind, J. C.
AU - Yan, J. Q.
AU - Zhou, J. S.
AU - Goodenough, J. B.
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/12/31
Y1 - 2014/12/31
N2 - 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. 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.
AB - 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. 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.
UR - http://www.scopus.com/inward/record.url?scp=84951124568&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.90.214111
DO - 10.1103/PhysRevB.90.214111
M3 - Article
AN - SCOPUS:84951124568
SN - 1098-0121
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 214111
ER -