Abstract
We have investigated microstructures giving rise to magnetocapacitance effect in Ti-doped YMnO3 (YMn1-xTixO3) by both electron diffraction and real-space imaging techniques. Diffuse scattering elongating along the [110] direction due to the instability of the Mn trimerization were found in the x=0.175 compound, which exhibits the enhanced magnetocapacitance effect. With increasing Ti concentration, the centrosymmetric (paraelectric) R3̄c phase grows up at the expense of the ferroelectric P63cm phase around x=0.20 and the R3̄c phase is dominant above x=0.30. Our present results indicate that the Mn trimers with the short-range correlation inside the ferroelectric nanodomains with the 10-20nm size should be responsible for the enhancement of the magnetocapacitance and, on the other hand, the appearance of the R3̄c phase suppressed the magnetocapacitance effect.
Original language | English |
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Article number | 224434 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 72 |
Issue number | 22 |
DOIs | |
Publication status | Published - 2005 Dec 1 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics