Low temperature orthorhombic to monoclinic transition due to size effect in Nd{sub 0.7}Ca{sub 0.3-x}Sr{sub x}MnO{sub 3}: Evidence for a new type of charge ordering
Journal Article
·
· Journal of Solid State Chemistry
- ISMRA et Universite de Caen (France); and others
The structures of the perovskites Nd{sub 0.7}Ca{sub 0.30-x}Sr{sub x}MnO{sub 3} have been determined at 293 and 1.7 K for x = 0, 0.08, and 0.3. All these manganites, except the low-temperature form of Nd{sub 0.7}Ca{sub 0.3}MnO{sub 3} (x=0), exhibit the classical orthorhombic Pnma (GdFeO{sub 3}) structure. For Nd{sub 0.7}Ca{sub 0.3}MnO{sub 3}, a monoclinic structure, involving a new kind of charge ordering, is observed at 1.7 K. The importance of this phenomenon for the understanding of the CMR properties of these materials is emphasized.
- OSTI ID:
- 555038
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 127; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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