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Charge/orbital ordering structure of Pr(1-x)Ca(x)MnO(3)(x = 3/8) examined by low-temperature transmission electron microscopy
- Source :
- Physical review letters. 88(9)
- Publication Year :
- 2001
-
Abstract
- The structural phase transition of Pr(1-x)Ca(x)MnO(3)(x = 3/8) was investigated by means of low-temperature transmission electron microscopy. Superlattice reflection spots with a modulation wave vector q(1) = (0,1/2,0) appeared below 230 K, indicating formation of the d(3x(2-r(2))/d(3y(2)-r(2)) type of charge/orbital ordering. Below 150 K, a new series of superlattice reflection spots with a modulation wave vector q(2) = (1/4,1/4,1/2) appeared, suggesting an additional ordering of excess 1/8 Mn(3+), necessary due to the deviation of x from 1/2, with the occupation of the d(3z(2-r(2)) type of e(g) orbital.
Details
- ISSN :
- 00319007
- Volume :
- 88
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.pmid..........6c79180c19018f247b76fa5aa6c23291