Experimental evidence for an intermediate phase in the multiferroic YMnO3
arXiv:cond-mat/0601547 · doi:10.1088/0953-8984/19/46/466212
Abstract
We have studied YMnO by high-temperature synchrotron X-ray powder diffraction, and have carried out differential thermal analysis and dilatometry on a single crystal sample. These experiments show two phase transitions at about 1100K and 1350K, respectively. This demonstrates the existence of an intermediate phase between the room temperature ferroelectric and the high temperature centrosymmetric phase. This study identifies for the first time the different high-temperature phase transitions in YMnO.
10 pages 5 figures. New version, Additional data, Journal of Physics: Condensed Matter, in Press