Crystal Growth and Structure Determination of LaMIn5 (M=Co, Rh, Ir)

✍ Scribed by Robin T. Macaluso; J.L. Sarrao; P.G. Pagliuso; N.O. Moreno; R.G. Goodrich; D.A. Browne; Frank R. Fronczek; Julia Y. Chan

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 224 KB
• Volume: 166
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2002.9597

✦ Synopsis

The compounds CeMIn 5 (M¼ Co; Rh, Ir) have been shown to exhibit heavy fermion behavior. In order to better understand this effect and the nature of the observed superconductivity, we have synthesized and characterized the non-magnetic analogs, LaMIn 5 (M¼ Co; Rh, Ir). The structures of LaCoIn 5 , LaRhIn 5 , and LaIrIn 5 were determined by single-crystal X-ray diffraction. CeMIn 5 and LaMIn 5 compounds are isostructural and adopt a tetragonal structure with space group P4/mmm, Z ¼ 1: Lattice parameters are a ¼ 4:6399ð4Þ and c ¼ 7:6151ð6Þ ( A for LaCoIn 5 , a ¼ 4:6768ð3Þ and c ¼ 7:5988ð7Þ ( A for LaRhIn 5 , and a ¼ 4:6897ð6Þ and c ¼ 7:5788ð12Þ ( A for LaIrIn 5 . We compare these experimental data with band structure computations and examine structural trends that affect the magnetic and transport properties of these compounds.