ChemInform Abstract: Structural Evolution and Properties of Solid Solutions of Hexagonal InMnO3 and InGaO3.

✍ Scribed by Dmitriy A. Rusakov; Alexei A. Belik; Stanislav Kamba; Maxim Savinov; Dmitry Nuzhnyy; Taras Kolodiazhnyi; Kazunari Yamaura; Eiji Takayama-Muromachi; Fedir Borodavka; Jan Kroupa

• Publisher: John Wiley and Sons
• Year: 2011
• Weight: 22 KB
• Volume: 42
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.201125008

✦ Synopsis

Structural Evolution and Properties of Solid Solutions of Hexagonal InMnO 3 and

InGaO3. -InMn1-xGaxO3 (0 ≤ x ≤ 1) solid solutions are prepared from stoichiometric mixtures of In2O3, Ga2O3, and Mn2O3 (Au capsules, 6 GPa, 1373 K, 30 min) and characterized by powder XRD, and magnetic and dielectric measurements. Samples with 0.0 ≤ x ≤ 0.4 crystallize in the space group P63cm (Z = 6) and samples with 0.5 ≤ x ≤ 1 crystallize in the space group P6 3 /mmc (Z = 2). A P6 3 cm→P6 3 /mmc phase transition exists at about 480 K in InMn0.6Ga0.4O3 and at 950 K in InMn0.7Ga0.3O3. However, no dielectric anomalies occur in the megahertz and terahertz frequency ranges, indicating that this transition does not have a ferroelectric origin. -(RUSAKOV, D. A.;