Structure and magnetic properties of tetravalent praseodymium perovskite SrPrO{sub 3}

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1997.7471· OSTI ID:569690

Hinatsu, Yukio; Itoh, Massahiro ^[1]; Edelstein, N ^[2]

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1. Hokkaido Univ., Sapporo (Japan)
2. Lawrence Berkeley National Lab., CA (United States)

The crystal structure of a tetravalent praseodymium perovskite SrPrO{sub 3} has been investigated by powder X-ray diffraction using Rietvelt analysis method; it is orthorhombic (a = 6.1168(8), b = 8.5487(9), c = 5.9857(7) {angstrom}) with the space group Pbnm. The distortion from the ideal cubic perovskite structure for SrPrO{sub 3} is much larger than that for BaPrO{sub 3}; the octahedral array of oxygen ions about Pr{sup 4+} is considerably distorted in SrPrO{sub 3}. The magnetic susceptibility measurements of SrPrO{sub 3} show no existence of the magnetic ordering down to 2.0 K. This is in contrast to the result of isomorphous BaPrO{sub 3} which shows an antiferromagnetic transition at 11.5 K. The electron paramagnetic resonance (EPR) spectrum of the Pr{sup 4+} could be measured by doping it in an isomorphous SrCeO{sub 3} which is diamagnetic and lowering the temperature to 4.2 K. The EPR spectrum was anisotropic, which corresponds to the deviation of the octahedral oxygen coordination symmetry around the Pr{sup 4+} ion. The g values obtained are discussed in terms of the crystal field theory.

• OSTI ID: 569690
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 132; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
PEROVSKITE
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
SYMMETRY
X-RAY DIFFRACTION