TY - JOUR
T1 - Doping effect on the charge ordering in AlV 2O 4
AU - Horibe, Y.
AU - Kurushima, K.
AU - Mori, S.
AU - Asada, T.
AU - Koyama, Y.
AU - Shingu, M.
AU - Katsufuji, T.
PY - 2005/2/1
Y1 - 2005/2/1
N2 - Effect of the Cr doping on the stable charge ordering (CO) in the spinal compound AlV 2O 4 was investigated by transmission electron microscopy. It is found that the stable CO is destabilized drastically by substituting Cr ions for V ones and the long-ranged CO in AlV 2O 4 becomes short ranged. The size of the CO microdomains in AlV 2-xCr xO 4 with x=0.125 was estimated to be about 10-20 nm. Furthermore, high-resolution lattice images revealed fine mixture of the CO and charge disordered microdomains in AlV 2-xCr xO 4 at room temperature. In addition, we found the presence of the characteristic diffuse scattering due to local lattice distortion induced by the Cr substitution in AlV 2-xCr xO 4. Our results suggested that doped Cr 3+ ions should serve as a quenched "charge" impurity in the CO structure of AlV 2O 4, which is characterized as the charge frustration system.
AB - Effect of the Cr doping on the stable charge ordering (CO) in the spinal compound AlV 2O 4 was investigated by transmission electron microscopy. It is found that the stable CO is destabilized drastically by substituting Cr ions for V ones and the long-ranged CO in AlV 2O 4 becomes short ranged. The size of the CO microdomains in AlV 2-xCr xO 4 with x=0.125 was estimated to be about 10-20 nm. Furthermore, high-resolution lattice images revealed fine mixture of the CO and charge disordered microdomains in AlV 2-xCr xO 4 at room temperature. In addition, we found the presence of the characteristic diffuse scattering due to local lattice distortion induced by the Cr substitution in AlV 2-xCr xO 4. Our results suggested that doped Cr 3+ ions should serve as a quenched "charge" impurity in the CO structure of AlV 2O 4, which is characterized as the charge frustration system.
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U2 - 10.1103/PhysRevB.71.052411
DO - 10.1103/PhysRevB.71.052411
M3 - Article
AN - SCOPUS:15744365204
SN - 0163-1829
VL - 71
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 5
M1 - 052411
ER -