Structural and physical properties of Re substituted B-site ordered and disordered SrCo{sub 1-x}Re{sub x}O{sub 3-{delta}} (x=0.1, 0.25, 0.5)

Journal Article · Tue Feb 14 23:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.12.017· OSTI ID:21612918

Baszczuk, A ^[1]; Dabrowski, B; Kolesnik, S; Chmaissem, O ^[2]; Avdeev, M ^[3]

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1. Wroclaw University of Technology, Institute of Materials Science and Applied Mechanics, 50-370 Wroclaw (Poland)
2. Department of Physics, Northern Illinois University, DeKalb, IL 60115 (United States)
3. Bragg Institute, Australian Nuclear Science and Technology Organization, Menai, NSW 2234 (Australia)

Synthesis conditions, structural, magnetic and transport properties have been studied for SrCo{sub 1-x}Re{sub x}O{sub 3-{delta}} samples with x=0.1, 0.25, 0.5. SrCo{sub 0.9}Re{sub 0.1}O{sub 3-{delta}} forms in air and remains stable on cooling indicating that small amounts of Re{sup 7+} stabilize a B-site disordered Pm-3m phase inhibiting formation of a hexagonal phase observed for SrCoO{sub 3-{delta}}. After oxygenation SrCo{sub 0.9}Re{sub 0.1}O{sub 2.94} becomes ferromagnetic below 125 K and shows metallic-like conductivity with moderate magnetoresistance at low temperatures. Fully oxygenated double perovskite Sr{sub 2}CoReO{sub 6} (x=0.5) forms under reducing conditions and is tetragonal at room temperature. A hysteretic transition to the antiferromagnetic state at low temperatures ({approx}50-60 K) is coupled with a drastic change of electronic and thermal properties. Contrary to previous reports [A. Nag et al., Chem. Mater. 20(13) (2008) 4420-4424] SrCo{sub 0.75}Re{sub 0.25}O{sub 3} is not a partially cation ordered Sr{sub 4}Co{sub 3}ReO{sub 12} phase, but a mixture of two structural and magnetic phases with disordered SrCo{sub 1-xd}Re{sub xd}O{sub 3} and ordered SrCo{sub 1-xo}Re{sub xo}O{sub 3} compositions where xd>0.1 and xo<0.5. - Graphical abstract: Neutron diffraction pattern for SrCo{sub 0.75}Re{sub 0.25}O{sub 3}. SrCo{sub 0.75}Re{sub 0.25}O{sub 3} is not a partially cation ordered Sr{sub 4}Co{sub 3}ReO{sub 12} phase, but a mixture of two structural and magnetic phases with disordered SrCo{sub 1-xd}Re{sub xd}O{sub 3} and ordered SrCo{sub 1-xo}Re{sub xo}O{sub 3} compositions where xd>0.1 and xo<0.5. Highlights: Black-Right-Pointing-Pointer SrCo{sub 0.9}Re{sub 0.1}O{sub 2.94} is a B-site disordered cubic Pm-3m phase. Black-Right-Pointing-Pointer SrCo{sub 0.9}Re{sub 0.1}O{sub 2.94} is ferromagnetic below 125 K with metallic-like conductivity. Black-Right-Pointing-Pointer Sr{sub 2}CoReO{sub 6} is tetragonal at room temperature and antiferromagnetic below {approx}50-60 K. Black-Right-Pointing-Pointer SrCo{sub 0.75}Re{sub 0.25}O{sub 3} is not a partially cation ordered Sr{sub 4}Co{sub 3}ReO{sub 12} phase. Black-Right-Pointing-Pointer SrCo{sub 0.75}Re{sub 0.25}O{sub 3} is a mixture of disordered and ordered perovskites.

• OSTI ID: 21612918
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 186; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANTIFERROMAGNETISM
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETISM
MAGNETORESISTANCE
MINERALS
NEUTRON DIFFRACTION
OXIDE MINERALS
PEROVSKITE
PEROVSKITES
PHYSICAL PROPERTIES
SCATTERING
SYNTHESIS
THERMODYNAMIC PROPERTIES