Synthesis and properties of a new quadruple perovskite: A-site ordered PbMn{sub 3}Mn{sub 4}O{sub 12}

Journal Article · Fri Jun 15 04:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.02.036· OSTI ID:22012159

Locherer, T; Dinnebier, R; Kremer, R K ^[1]; Greenblatt, M ^[2]; Jansen, M ^[1]

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1. Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart (Germany)
2. Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854 (United States)

PbMn{sub 3}Mn{sub 4}O{sub 12} a quadruple perovskite was prepared by high pressure and high temperature synthesis. Powder X-ray diffraction (PXD) and differential scanning calorimetry reveal a structural phase transition at {approx}380 K. Rietveld refinement of the synchrotron room temperature data indicate rhombohedral symmetry (R-3) with a=6.43675(4) A and {alpha}=109.556(2) Degree-Sign . Similar 423 K PXD data refined in a body centered cubic cell (Im-3) with a=7.4283(9) A. The temperature variation of magnetization, shows a magnetic field dependent antiferromagnetic-like transition at 68 K, and dynamic fluctuations indicative of magnetic frustration. The semiconducting electrical behavior indicates a large decrease in the conductivity near 68 K. The temperature dependence of the real part of the dielectric constant, {epsilon}{sub real} increases dramatically at {approx}68 K, and shows relaxor-type ferroelectric behavior as a function of frequency. The intimate coupling of magnetic, electrical and dielectric properties at 68 K in PbMn{sub 3}Mn{sub 4}O{sub 12} suggests possible multiferroic behavior. - Graphical abstract: Resistance vs. temperature plot showing drastically increasing resistances at temperatures below 68 K (a). Formation of a frequency dependency of the dielectric constant between 68 K and ambient temperature (b). Sharp cusp in the magnetic susceptibility observed at 68 K which is suppressed with increasing magnetic field (c) indicates coupling of magnetic, electric and dielectric effects. Highlights: Black-Right-Pointing-Pointer PbMn{sub 3}Mn{sub 4}O{sub 12} a quadruple perovskite was prepared at high pressure. Black-Right-Pointing-Pointer A structural transition is seen at 380 K from space group R-3-to-Im-3. Black-Right-Pointing-Pointer An antiferromagnetic transition is observed at 68 K. Black-Right-Pointing-Pointer It is semiconducting with a large decrease in the conductivity near 68 K. Black-Right-Pointing-Pointer The temperature dependence of the dielectric constant increases dramatically at 68 K. Black-Right-Pointing-Pointer Coupling of magnetic, electric and dielectric behavior suggests multiferroicity.

• OSTI ID: 22012159
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. . 190; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMBIENT TEMPERATURE
ANTIFERROMAGNETISM
CALORIMETRY
FERROELECTRIC MATERIALS
FREQUENCY DEPENDENCE
MAGNETIC FIELDS
MAGNETIC SUSCEPTIBILITY
PERMITTIVITY
PEROVSKITE
POWDERS
SPACE GROUPS
SYNTHESIS
TEMPERATURE DEPENDENCE
TRIGONAL LATTICES
X-RAY DIFFRACTION