2008/04/11 by Rodolfo H. Romero, Romero, Rodolfo H.
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic physics #Chemistry #Component (thermodynamics) #Condensed matter physics #FOS: Physical sciences #Halide #Heusler alloys: electronic and magnetic properties #Inorganic Chemistry and Materials #Mathematics #Nuclear magnetic resonance #Physics #Quantum electrodynamics #Quantum mechanics #Rare-earth and actinide compounds #Resonance (particle physics) #Scalar (mathematics) #Spin (aerodynamics) #Thermodynamics #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.0804.1952
10 pages, 2 figures
arxiv created 2008/04/11 · openalex publication_date 2008/04/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The results of calculations of nuclear magnetic resonance (NMR) parameters for the lead halides is reported in this paper. The results are obtained by using four-component methods. The use of the nonrelativistic Lévy-Leblond Hamiltonian along with the relativistic Dirac-Coulomb and spin-free ones allows us to discriminate scalar and spin-dependent effects on the parameters. It is found that the wide range of the lead NMR spectra and their large anisotropies are, mainly, due to spin-dependent effects on the paramagnetic term. Among the relativistic scalar corrections, the so-called spin-Zeeman kinetic-energy term turns out to be dominant. The reduced spin-spin coupling constants become proportional to the product of the atomic numbers of the coupled nuclei.