Direct observation of oxygen superstructures in manganites.
We report the observation of superstructures associated with the oxygen 2p states in two prototypical manganites using x-ray diffraction at the oxygen K edge. In the stripe order system Bi0.31Ca0.69MnO3, hole-doped O states are orbitally ordered, at the same propagation vector as the Mn orbital ordering, but no oxygen charge stripes are found at this periodicity. In La7/8Sr1/8MnO3, we observe a 2p charge ordering described by alternating hole-poor and hole-rich MnO planes that is consistent with some of the recent predictions.
Grenier
S
S
Institut Néel, CNRS & Université Joseph Fourier, BP 166, F-38042 Grenoble Cedex 9, France.
Thomas
K J
KJ
Hill
J P
JP
Staub
U
U
Bodenthin
Y
Y
García-Fernández
M
M
Scagnoli
V
V
Kiryukhin
V
V
Cheong
S-W
SW
Kim
B G
BG
Tonnerre
J M
JM