Crystal Growth and Structure Determination of LaMIn5 (M=Co, Rh, Ir) |
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| Authors: | Robin T MacalusoJL Sarrao PG PagliusoNO Moreno RG GoodrichDA Browne Frank R FronczekJulia Y Chan |
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| Institution: | a Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana, 70803b Condensed Matter and Thermal Physics, Los Alamos National Laboratory, Los Alamos, New Mexico, 87545c Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, 70803 |
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| Abstract: | The compounds CeMIn5 (M=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, LaMIn5 (M=Co, Rh, Ir). The structures of LaCoIn5, LaRhIn5, and LaIrIn5 were determined by single-crystal X-ray diffraction. CeMIn5 and LaMIn5 compounds are isostructural and adopt a tetragonal structure with space group P4/mmm, Z=1. Lattice parameters are a=4.6399(4) and c=7.6151(6) Å for LaCoIn5, a=4.6768(3) and c=7.5988(7) Å for LaRhIn5, and a=4.6897(6) and c=7.5788(12) Å for LaIrIn5. We compare these experimental data with band structure computations and examine structural trends that affect the magnetic and transport properties of these compounds. |
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| Keywords: | heavy fermion single-crystal rare-earth intermetallics superconductivity LaCoIn5 LaRhIn5 LaIrIn5 |
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