TY - JOUR
T1 - New double perovskites, LaBaTaNi1-xCoxO6
T2 - Structural, dielectric and magnetic studies
AU - Samal, S. L.
AU - Magdaleno, T.
AU - Ramanujachary, K. V.
AU - Lofland, S. E.
AU - Ganguli, A. K.
PY - 2010/8/1
Y1 - 2010/8/1
N2 - Double perovskites of the type LaBaNi1-xCoxTaO 6 (0 ≤ x ≤ 1) have been synthesized by solid state method. The compounds crystallize in the tetragonal space group, I4/m. Rietveld refinement has been carried out to determine the phase purity and to study the cation ordering. X-ray photoelectron spectroscopy confirms Co(II) in all compositions. The end members in LaBaNi1-xCoxTaO6 show high dielectric constant values. Antiferromagnetic ordering has been observed for all the compositions and the ordering temperature in LaBaNi1-xCo xTaO6 gradually decreases with increase in Co doping, which has been attributed to the decrease in covalence of Co/Ni-O bonds.
AB - Double perovskites of the type LaBaNi1-xCoxTaO 6 (0 ≤ x ≤ 1) have been synthesized by solid state method. The compounds crystallize in the tetragonal space group, I4/m. Rietveld refinement has been carried out to determine the phase purity and to study the cation ordering. X-ray photoelectron spectroscopy confirms Co(II) in all compositions. The end members in LaBaNi1-xCoxTaO6 show high dielectric constant values. Antiferromagnetic ordering has been observed for all the compositions and the ordering temperature in LaBaNi1-xCo xTaO6 gradually decreases with increase in Co doping, which has been attributed to the decrease in covalence of Co/Ni-O bonds.
UR - http://www.scopus.com/inward/record.url?scp=77955419743&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955419743&partnerID=8YFLogxK
U2 - 10.1016/j.solidstatesciences.2010.05.014
DO - 10.1016/j.solidstatesciences.2010.05.014
M3 - Article
AN - SCOPUS:77955419743
VL - 12
SP - 1382
EP - 1386
JO - Solid State Sciences
JF - Solid State Sciences
SN - 1293-2558
IS - 8
ER -