Strained Structure in Ho0.5Sr0.5MnO3

✍ Scribed by C. Autret; C. Martin; A. Maignan; M. Hervieu; B. Raveau; G. André; F. Bourée

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 711 KB
• Volume: 165
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9494

✦ Synopsis

The Ho 0.5 Sr 0.5 MnO 3 perovskite, synthesized in air, has been studied by combining neutron powder and electron diffraction techniques. The Pnma-type structure exhibits a strong tilting of the MnO 6 octahedra. This octahedra tilting and microtwinning involve a complex strained structure. No structural transition is observed down to 1.4 K, but short-range A-type antiferromagnetism running over only a few perovskite subcells is evidenced below E90 K. The different behavior of this perovskite compared to other Ln 0.5 Sr 0.5 MnO 3 perovskites is discussed in terms of A-site cationic mismatch.