Crystal Structures and Phase Transitions in the SrTiO3–SrZrO3 Solid Solution

✍ Scribed by Tony Kam-Yuen Wong; Brendan J. Kennedy; Christopher J. Howard; Brett A. Hunter; Tom Vogt

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 210 KB
• Volume: 156
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8896

✦ Synopsis

Laboratory and synchrotron X-ray powder di4raction and neutron powder di4raction have been used to determine crystal structures in the perovskites SrTi x Zr 1؊x O 3 . Superlattice re6ections in the neutron di4raction patterns proved to be the most reliable indicators of lower symmetry structures. The room temperature structures are orthorhombic Pbnm in the range of 04x40.4, tetragonal I4/mcm in the range 0.4(x40.95, and cubic Pm3 m for 0.95(x41. Additional measurements were made on the room-temperature tetragonal samples at x ‫؍‬ 0.5, 0.75, and 0.9. The 5rst two were examined at elevated temperatures, using neutron di4raction methods, where the transition tetragonal to cubic was noted. Measurements at low temperatures using synchrotron X-ray powder di4raction are reported.