Abstract
We investigated thoroughly change in the microstructure related to the charge ordered (CO) state in half-doped manganites such as Pr0.5Ca0.5MnO3 and Nd0.5Ca0.5MnO3 by the transmission electron microscopy. We found the incommensurate (IC) to commensurate (C) structural phase transition in Pr0.5Ca0.5MnO3 and Nd0.5Ca0.5MnO3. The magnitude of the wave vector characterizing the CO state changes with respect to the temperature. Real space images taken by using the superlattice spots due to the CO state revealed that the IC structure is characterized as the regular arrangement of the discommensurations with the phase slip of π along the [100] direction. Furthermore, the IC CO state is present as the microdomains with the size of 20–30 nm.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
