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Charge Ordered State in the Impurity-Doped Manganites
- Source :
- Journal of the Physical Society of Japan. 71:1280-1283
- Publication Year :
- 2002
- Publisher :
- Physical Society of Japan, 2002.
-
Abstract
- Impurity effect on the charge and orbital ordered (CO/OO) state in doped manganites has been studied by the transmission electron microscopy (TEM), in addition to the electric and magnetic measurements. In the Cr-doped manganites (Nd 0.5 Ca 0.5 Mn 1- y Cr y O 3 ), the CO/OO state characterized by the incommensurate wave vector is still realized as the microdomains with the size of 10–30 nm even at lower temperature of 20 K. On the other hand, the Sc-doped manganites (Nd 0.5 Ca 0.5 Mn 1- y Sc y O 3 ) clearly show an incommensurate to commensurate structural phase transition accompanying the formation of the long-ranged CO/OO state around 60 K. From our experimental findings, it is suggested that the substituted Cr 3+ and Sc 3+ ions serve as the spin impurity and hole vacancy, respectively.
Details
- ISSN :
- 13474073 and 00319015
- Volume :
- 71
- Database :
- OpenAIRE
- Journal :
- Journal of the Physical Society of Japan
- Accession number :
- edsair.doi...........91786f4d44fa3332da8438cd67c4a019
- Full Text :
- https://doi.org/10.1143/jpsj.71.1280