A Simple Localized-Itinerant Model for PrAl3: Crystal Field and Exchange Effects |
| P.J. Von Ranke Instituto de Física UERJ, Rua São Francisco Xavier 524, CEP 20550 - Rio de Janeiro RJ - Brasil L. Palermo Instituto de Física UFF, Rua São João Batista s/n - Centro, CEP 24020 - Niteroi RJ - Brasil and X.A. Da Silva Centro Brasileiro de Pesquisas Física - CBPF/CNPq, Rua Dr. Xavier Sigaud 150, 22290 - Rio de Janeiro, RJ - Brasil |
| Received: January 17, 1989; in final version August 21, 1991 |
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| We present a simple magnetic model for PrAl3. The effects of crystal field are treated using a reduced set of levels and the corresponding wave functions are extracted from the actual crystal field levels of Pr+3 in a hexagonal symmetry. The exchange between 4f- and conduction-electrons are dealt within a molecular field approximation. An analytical magnetic state equation is derived and the magnetic behaviour discussed. The parameters of the model are estimated from a fitting of the inverse susceptibility of PrAl3 given in the literature. |
| DOI: 10.12693/APhysPolA.80.583 PACS numbers: 75.10.Dg, 75.30.Cr |