Annealing and pressure effects on structural and ferromagnetic transitions of La{sub 0.85}Sr{sub 0.15}MnO{sub 3} single crystals
Journal Article
·
· Physical Review, B: Condensed Matter
- Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226 (Japan)
A detailed study of annealing and pressure effects on structural phase-transition temperature (T{sub s}) and ferromagnetic transition temperature (T{sub c}) was investigated for single crystal La{sub 0.85}Sr{sub 0.15}MnO{sub 3}. T{sub s} and T{sub c}, respectively, decrease and increase with increasing pressure and annealing time, which indicated that the lattice distortion is relaxed and the double-exchange interaction is enhanced by annealing and pressure. Three states, orthorhombic phase state, orthorhombic and rhombohedral phases coexisting state, and rhombohedral phase state, can be induced by controlling annealing time at high temperature and by hydrostatic pressure. In the La{sub 0.85}Sr{sub 0.15}MnO{sub 3} compound, T{sub c} was found to increase about 15 K when the orthorhombic phase transforms to the rhombohedral phase. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 509046
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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