INVESTIGATIONS INTO THE ORIGIN OF CRYSTALLINE ELECTRIC FIELD EFFECTS ON RARE EARTH IONS. II. CONTRIBUTIONS FROM THE RARE EARTH ORBITALS,
Abstract
Within the limitations of the ionic approxima tion, different contributions to the crystalline electric field parameters arising from the orbit als of the rare earth ions are calculated with particular reference to the Pr(3) ion in PrCl3. Rare earth orbitals affect the crystalline elec tric field in three different ways arising from (1) multipole electric moments of the f-electrons in the externally impressed crystalline poten tial, (2) induced moments on the closed S, p and d shells caused by the surrounding charges, and (3) shielding of the external crystal field at the 4f electrons by the distorted orbitals. Gen eral expression for the shielding for any crystal potential term has been derived and is shown to be independent of m value. The nuclear anti shielding factor is calculated for the Pr(3) ion and on the basis of point charge value of crystal potential the expected quadrupolar fre quency of n.m.r. lines is evaluated for La(3) in LaCl3. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1963
- Accession Number
- AD0418502
Entities
People
- D. Ray
Organizations
- University of Oxford