ALaMnBO6 (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites

K. Ramesha; V. Thangadurai; D. Sutar; S. V. Subramanyam; G. N. Subbanna; J. Gopalakrishnan

doi:10.1016/S0025-5408(00)00248-8

ALaMnBO₆ (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites

K. Ramesha^*, V. Thangadurai, D. Sutar, S. V. Subramanyam, G. N. Subbanna, J. Gopalakrishnan

^*Corresponding author for this work

School of Chemistry

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

Abstract

We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO₆ for A = Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO₆, showing a doubling of the primitive cubic perovskite cell. While the B = Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between Mn^III/Ru^IV and Mn^II/Ru^V states that is biased toward the latter.

Original language	English
Pages (from-to)	559-565
Number of pages	7
Journal	Materials Research Bulletin
Volume	35
Issue number	4
DOIs	https://doi.org/10.1016/S0025-5408(00)00248-8
Publication status	Published - 1 Mar 2000

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title = "ALaMnBO6 (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites",

abstract = "We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO6 for A = Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO6, showing a doubling of the primitive cubic perovskite cell. While the B = Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between MnIII/RuIV and MnII/RuV states that is biased toward the latter.",

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TY - JOUR

T1 - ALaMnBO6 (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites

AU - Ramesha, K.

AU - Thangadurai, V.

AU - Sutar, D.

AU - Subramanyam, S. V.

AU - Subbanna, G. N.

AU - Gopalakrishnan, J.

PY - 2000/3/1

Y1 - 2000/3/1

N2 - We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO6 for A = Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO6, showing a doubling of the primitive cubic perovskite cell. While the B = Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between MnIII/RuIV and MnII/RuV states that is biased toward the latter.

AB - We report the synthesis and investigation of electrical and magnetic properties of double perovskites of the formula ALaMnBO6 for A = Ca, Sr, Ba and B = Fe, Ru. Powder X-ray diffraction (XRD) shows formation of cubic/pseudocubic perovskite structure for all the phases, with no obvious long-range ordering of B-site cations. Electron diffraction, however, reveals an ordering of Mn and Ru in ALaMnRuO6, showing a doubling of the primitive cubic perovskite cell. While the B = Fe phases are paramagnetic insulators, the B = Ru phases are ferrimagnetic semiconductors. It is likely that in the B = Ru phases, a valence equilibrium exists between MnIII/RuIV and MnII/RuV states that is biased toward the latter.

UR - https://www.scopus.com/pages/publications/0034156504

U2 - 10.1016/S0025-5408(00)00248-8

DO - 10.1016/S0025-5408(00)00248-8

M3 - Article

AN - SCOPUS:0034156504

SN - 0025-5408

VL - 35

SP - 559

EP - 565

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 4

ER -

ALaMnBO₆ (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites

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