Title of article :
Phase changes in : A synchrotron X-ray powder diffraction study
Author/Authors :
Ranjan، نويسنده , , Rajeev and Boysen، نويسنده , , Hans، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
A temperature dependent synchrotron X-ray powder diffraction study has been carried out on Na1/2Pr1/2TiO3 up to 850 °C. The compound shows orthorhombic (Pbnm) → orthorhombic (Ibmm) → tetragonal (I4/mcm) transitions at ∼150 °C, and ∼750 °C, respectively. An unusual volume expansion below 500 °C has been noticed in the Ibmm phase, suggesting the onset of another, yet unknown, physical phenomenon unrelated to the crystallographic changes below this temperature.
Keywords :
C. Crystal structure and symmetry , D. Phase transitions , A. Ferroelectrics
Journal title :
Solid State Communications
Journal title :
Solid State Communications
