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 (Nd0.5Ca0.5Mn1-yCryO3), 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 0.5Ca0.5Mn1-ySCy-O3) 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 Cr3+ and Sc3+ ions serve as the spin impurity and hole vacancy, respectively.
Original language | English |
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Pages (from-to) | 1280-1283 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 71 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2002 May 1 |
Externally published | Yes |
Keywords
- Charge ordering
- Electron microscopy
- Impurity effect
- Perovskite manganites
ASJC Scopus subject areas
- Physics and Astronomy(all)