X-ray induced insulator-metal transitions in CMR manganites [electronic resource].

Published: Arlington, Va. : National Science Foundation (U.S.), 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: 14 pages : digital, PDF file
Additional Creators: National Science Foundation (U.S.) and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

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−x}CaₓMnO₃. 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.

Report Numbers

E 1.99:bnl--65316
E 1.99: conf-971201--
conf-971201--
bnl--65316

Subject(s)

Materials Science

Other Subject(s)

Note

Published through SciTech Connect.
12/01/1997.
"bnl--65316"
" conf-971201--"
"DE98004628"
"KC020202"
": Grant NSF DMR-9303387"
"Grant NSF DMR-9701991"
1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997.
Hill, J.P.; Kiryukhin, V.; Keimer, B.; Tomioka, Y.; Vigliante, A.; Tokura, Y.; Casa, D.
Brookhaven National Lab., Dept. of Physics, Upton, NY (United States)

Funding Information

AC02-98CH10886

View MARC record | catkey: 14452104