Author/Authors :
Tataryn، نويسنده , , T. and Vasylechko، نويسنده , , L. and Savytskii، نويسنده , , D. and Berkowski، نويسنده , , M. and Paulmann، نويسنده , , C. and Bismayer، نويسنده , , U. and Tarnavsky، نويسنده , , A.، نويسنده ,
Abstract :
The structure of perovskite-type La0.95Sr0.05Ga0.95Mn0.05O3-x crystals has been investigated using high-resolution X-ray powder diffraction technique in the temperature range of 298–1173 К. A transition from orthorhombic (Pbnm) to rhombohedral (R 3 ¯ с) phase has been detected near 340 K. A chevron-like configuration of ferroelastic domain structure was observed in rhombohedral La0.95Sr0.05Ga0.95Mn0.05O3-x crystal using the Laue technique. The chevron-like pattern is formed by the intersection of W-type domain walls (211), (101) and (110) and demonstrates the reversibility of this domain wall structure configuration at thermal cycling through the phase transition point.
Keywords :
phase transition , SOFC , crystal structure , Twin structure
