ChemInform Abstract: High-Pressure Synthesis and Magnetic Properties of Layered Double Perovskites Ln2CuMO6 (Ln: La, Pr, Nd, and Sm; M: Sn and Zr).

✍ Scribed by M. AZUMA; S. KAIMORI; M. TAKANO

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 32 KB
• Volume: 30
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199903021

✦ Synopsis

High-Pressure Synthesis and Magnetic Properties of Layered Double Perovskites Ln 2 CuMO 6 (Ln: La, Pr, Nd, and Sm; M: Sn and Zr). -Ln 2 CuSnO 6 compounds (Ln: La, Nd, Sm) are prepared by reaction of Ln 2 O 3 , CuO, and SnO 2 (1000 • C, air, 4 d). The Pr 2 CuSnO 6 sample is formed by reaction of Pr 6 O 11 , CuO, SnO, and SnO 2 . Homogeneous samples are obtained at high pressures of 6-8 GPa and high temp. of 1000-1200 • C. La 2 CuZrO 6 , a new member of layered double perovskite is obtained from La 2 O 3 , CuO, and ZrO 2 (1100 • C, 6 GPa, air). The compounds La 2 CuSnO 6 , Pr 2 CuSnO 6 , Na 2 CuSnO 6 , and LaCuZrO 6 crystallize in the space group P2 1 /m with Z = 4 (powder XRD). In Nd 2 CuSnO 6 , both the Cu and Nd sublattice show weak ferromagnetism owing to spin canting. -(AZUMA, M.; KAIMORI, S.;