Crystal Structures and Magnetic Properties of New Quaternary Sulfides BaLn2MS5 (Ln=La, Ce, Pr, Nd; M=Co, Zn) and BaNd2MnS5

✍ Scribed by Makoto Wakeshima; Yukio Hinatsu

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 364 KB
• Volume: 159
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2001.9145

✦ Synopsis

Crystal structures and magnetic properties are investigated for new quaternary sul5des BaLn 2 TS 5 (Ln ‫؍‬ La, Ce, Pr, Nd; T ‫؍‬ Co, Zn) and BaNd 2 MnS 5 . These compounds crystallize in a tetragonal structure (space group I4mcm), which is isostructural with BaLa 2 MnS 5 . Their lattice parameters increase monotonically with the sizes of the lanthanide and transition metal. The increase of the a values is mainly due to the lanthanide size, and that of the c values is due to the transition metal size. In BaLn 2 CoS 5 , the Co 2؉ ions have the unquenched orbital moments. In BaNd 2 MnS 5 , the magnetic anomaly due to the antiferromagnetic ordering of the Mn 2؉ ion, is found at 63 K. Antiferromagnetic orderings for the Co 2؉ ions are observed at ca. 65 K in BaLn 2 CoS 5 (Ln ‫؍‬ La, Ce, Pr, Nd). For BaNd 2 TS 5 (T ‫؍‬ Mn, Co, Zn), the Nd 3؉ ions also show antiferromagnetic behavior below 6 K.