Structural and magnetic properties of high-pressure/high-temperature synthesized (Sr{sub 1-x}R{sub x})CoO{sub 3} (R=Y and Ho) perovskites

Journal Article · Sat Jul 15 00:00:00 EDT 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.04.028· OSTI ID:20905370

Balamurugan, S ^[1]; Takayama-Muromachi, E ^[1]

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1. Superconducting Materials Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

Polycrystalline perovskite cobalt oxides Sr{sub 1-x}R{sub x}CoO{sub 3} (R=Y and Ho; 0=<x=<1) were prepared by high-pressure/high-temperature technique. X-ray powder patterns of the Y-system indicated cubic perovskite form for 0=<x=<0.5, and orthorhombic perovskite form for x=0.8 and 1.0, while coexisting of the two phases for x=0.6. The cubic perovskite samples had metallic electric resistivities while the orthorhombic ones with semiconducting or insulating nature. The parent compound SrCoO{sub 3} showed a ferromagnetic transition at 266K. With the Y substitution, the transition temperature increased slightly to {approx}275K at x=0.1, then decreased rapidly to {approx}60K for x=0.6. The YCoO{sub 3} (x=1) sample showed non-magnetic behavior. The Ho-substituted system showed quite similar structural, transport and magnetic properties to those of the Y-system.

• OSTI ID: 20905370
• Journal Information: Journal of Solid State Chemistry, Vol. 179, Issue 7; Other Information: DOI: 10.1016/j.jssc.2006.04.028; PII: S0022-4596(06)00247-7; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHARGED-PARTICLE TRANSPORT
COBALT OXIDES
ELECTRIC CONDUCTIVITY
FERROMAGNETISM
HOLMIUM COMPOUNDS
MAGNETIC PROPERTIES
ORTHORHOMBIC LATTICES
PEROVSKITE
POLYCRYSTALS
PRESSURE RANGE MEGA PA 10-100
STRONTIUM COMPOUNDS
SYNTHESIS
TEMPERATURE RANGE 0400-1000 K
TRANSITION TEMPERATURE
X RADIATION
YTTRIUM COMPOUNDS