We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Variety of LaSrMnO Structures Induced by Growth Conditions and Laser Irradiation.
- Authors
Zamo&icaron;lenko, Z.A.; Okunev, V.D.; Pushenko, E.I.; D'yachenko, T.A.; Cherenkov, A.; Gierlowski, P.; Lewandowski, S.J.; Abal'oshev, A.; Klimov, A.; Szewczyk, A.
- Abstract
Crystallographic phase transitions in perovskite-like LaSrMnO metallic oxides are studied. The transitions are induced when internal stresses generated during film synthesis (at temperatures between 450 and 730°C) vary (decrease or increase) upon subsequent irradiation by a KrF laser emitting in the UV range. As the synthesis temperature T[sub s] grows, the rhombohedral-to-orthorhombic phase transition occurs at 650–670°C. The resistivity is shown to be either temperature-independent, ρ(T ) = const, at T < T[sub crit], or varies and reaches a maximum, ρ(T) = ρ[sub max], at the Curie temperature T[sub c]. Optical transmission spectra taken at photon energies hω = 0.5–2.5 eV exhibit both a high (0.8–0.9) and low (0.1–0.3) transmission coefficient t, depending on the synthesis temperature. As follows from X-ray diffraction data, the laser irradiation causes a phase transition only in LaSrMnO films grown at T[sub s] < 650°C. Phases of different size scales appear: the long-range-order orthorhombic matrix and mesoscopic-range-order rhombohedral clusters are observed in the films grown at T[sub s] = 450–550°C and the rhombohedral matrix with orthorhombic clusters, in the films grown at T[sub s] = 550–650°C. © 2003 MAIK “Nauka / Interperiodica”.
- Subjects
CRYSTALLOGRAPHY; PHASE transitions
- Publication
Technical Physics, 2003, Vol 48, Issue 2, p250
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/1.1553569