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

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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 2010

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/j.solidstatesciences.2010.05.014

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@article{1a1ded599de2485cabe4b8ba2697b5ac,

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.}",

note = "Funding Information: A.K.G. thanks Department of Science and Technology for funding. S.L.S. would like to thank CSIR for a research fellowship. S.E.L. acknowledges support from NSF MRSEC DMR 0520471 . K.V.R. acknowledges the support of CP-STIO program of DST, Government of India .",

year = "2010",

month = aug,

doi = "10.1016/j.solidstatesciences.2010.05.014",

language = "English (US)",

volume = "12",

pages = "1382--1386",

journal = "Solid State Sciences",

issn = "1293-2558",

publisher = "Elsevier Masson s.r.l.",

number = "8",

}

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.

N1 - Funding Information: A.K.G. thanks Department of Science and Technology for funding. S.L.S. would like to thank CSIR for a research fellowship. S.E.L. acknowledges support from NSF MRSEC DMR 0520471 . K.V.R. acknowledges the support of CP-STIO program of DST, Government of India .

PY - 2010/8

Y1 - 2010/8

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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U2 - 10.1016/j.solidstatesciences.2010.05.014

DO - 10.1016/j.solidstatesciences.2010.05.014

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VL - 12

SP - 1382

EP - 1386

JO - Solid State Sciences

JF - Solid State Sciences

IS - 8

ER -

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

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