New double perovskites, LaBaTaNi1-xCoxO6: Structural, dielectric and magnetic studies

S. L. Samal; T. Magdaleno; K. V. Ramanujachary; S. E. Lofland; A. K. Ganguli

doi:10.1016/j.solidstatesciences.2010.05.014

New double perovskites, LaBaTaNi_1-xCo_xO₆: Structural, dielectric and magnetic studies

S. L. Samal, T. Magdaleno, K. V. Ramanujachary, S. E. Lofland, A. K. Ganguli

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Double perovskites of the type LaBaNi_1-xCo_xTaO 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 LaBaNi_1-xCo_xTaO₆ show high dielectric constant values. Antiferromagnetic ordering has been observed for all the compositions and the ordering temperature in LaBaNi_1-xCo _xTaO₆ gradually decreases with increase in Co doping, which has been attributed to the decrease in covalence of Co/Ni-O bonds.

Original language	English (US)
Pages (from-to)	1382-1386
Number of pages	5
Journal	Solid State Sciences
Volume	12
Issue number	8
DOIs	https://doi.org/10.1016/j.solidstatesciences.2010.05.014
State	Published - Aug 1 2010

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "New double perovskites, LaBaTaNi1-xCoxO6: Structural, dielectric and magnetic studies",

abstract = "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.",

author = "Samal, {S. L.} and T. Magdaleno and Ramanujachary, {K. V.} and Lofland, {S. E.} and Ganguli, {A. K.}",

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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.

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