Structure-property relationship in the ordered-perovskite-related oxide Sr{sub 3.12}Er{sub 0.88}Co{sub 4}O{sub 10.5}

Journal Article · Fri Jun 01 00:00:00 EDT 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.75.220406· OSTI ID:20951525

Ishiwata, Shintaro; Kobayashi, Wataru; Terasaki, Ichiro ^[1]; Kato, Kenichi; Takata, Masaki ^[2]

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1. Department of Applied Physics, Waseda University, Shinjuku, Tokyo 169-8555 (Japan)
2. RIKEN/Spring-8 Center, Sayo, Hyogo 679-5148 (Japan)

Synchrotron x-ray-diffraction patterns were measured and analyzed for a polycrystalline sample of the room-temperature ferromagnet Sr{sub 3.12}Er{sub 0.88}Co{sub 4}O{sub 10.5} from 300 to 650 K, from which two structural phase transitions were found to occur successively. The higher-temperature transition at 509 K is driven by ordering of the oxygen vacancies, which is closely related to the metallic state at high temperatures. The lower-temperature transition at 360 K is of first order, at which the ferromagnetic state suddenly appears exhibiting a jump in magnetization and resistivity. Based on the refined structure, possible spin and orbital models for the magnetic order are proposed.

• OSTI ID: 20951525
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 75, Issue 22; Other Information: DOI: 10.1103/PhysRevB.75.220406; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ERBIUM COMPOUNDS
FERROMAGNETIC MATERIALS
MAGNETIZATION
OXIDES
OXYGEN
PEROVSKITE
PHASE TRANSFORMATIONS
POLYCRYSTALS
SOLIDS
STRONTIUM COMPOUNDS
SYNCHROTRONS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TRANSITION TEMPERATURE
VACANCIES
X-RAY DIFFRACTION