Author/Authors :
Kennedy، نويسنده , , Brendan J. and Saines، نويسنده , , Paul J. and Kubota، نويسنده , , Yoshiki and Minakata، نويسنده , , Chiharu and Hano، نويسنده , , Hiroko and Kato، نويسنده , , Kenichi and Takata، نويسنده , , Masaki، نويسنده ,
Abstract :
The structure of the cation-ordered double perovskite Ba2HoTaO6 was examined using synchrotron X-ray powder diffraction at fine temperature intervals over the range of 90–300 K. Ba2HoTaO6 has a cubic structure in space group F m 3 ¯ m at room temperature. A proper ferroelastic phase transition to I4/m tetragonal symmetry occurs near approximately 260 K. Analysis of the spontaneous tetragonal strain versus temperature indicated that the phase transition is second order in nature.
Keywords :
A. Oxide , D. Crystal structure , D. Phase transitions , C. X-ray diffraction
