X-ray induced insulator-metal transitions in CMR manganites
- Princeton Univ., NJ (United States). Dept. of Physics
- Brookhaven National Lab., Upton, NY (United States). Dept. of Physics
- Joint Research Center for Atom Technology, Tsukuba, Ibaraki (Japan)
In this work the authors report a study of the photoinduced insulator-to-metal transition in manganese oxide perovskites of the formula Pr{sub 1{minus}x}Ca{sub x}MnO{sub 3}. The transition is closely related to the magnetic field induced insulator-to-metal transition (CMR effect) observed in these materials. It is accompanied by a dramatic change in the magnetic properties and lattice structure: the material changes from an insulating charge-ordered canted antiferromagnet to a ferromagnetic metal. The authors present an investigation of the transport and structural properties of these materials over the course of the transition (which usually takes about an hour to complete). The current-voltage characteristics exhibited by the material during the transition are highly nonlinear, indicating a large inhomogeneity of the transitional state. Possible practical applications of this novel type of transition are briefly discussed. They also report a high resolution X-ray diffraction study of the charge ordering in these materials. The temperature dependent charge ordering structure observed in these compounds is more complex than previously reported.
- Research Organization:
- Brookhaven National Lab., Dept. of Physics, Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States); Packard Foundation, Los Altos, CA (United States); Sloan (Alfred P.) Foundation, New York, NY (United States); New Energy and Industrial Technology Development Organization, Tokyo (Japan); Ministry of Education, Science and Culture (Japan)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 658155
- Report Number(s):
- BNL-65316; CONF-971201-; ON: DE98004628; BR: KC020202; CNN: Grant NSF DMR-9303387; Grant NSF DMR-9701991; TRN: AHC2DT06%%39
- Resource Relation:
- Conference: 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997; Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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