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Trigonal Centre of Gd 3+ in CdS Investigated by Variable‐Frequency EPR
Author(s) -
Urban W.,
Siegel E.,
Hillmer W.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220620107
Subject(s) - electron paramagnetic resonance , trigonal crystal system , hexagonal crystal system , symmetry (geometry) , spin (aerodynamics) , condensed matter physics , materials science , chemistry , crystallography , nuclear magnetic resonance , physics , atomic physics , mathematics , geometry , thermodynamics , crystal structure
For the new axial centre of Gd 3+ in hexagonal CdS, reported recently, a more detailed analysis of results obtained by variable‐frequency EPR is carried out, establishing trigonal symmetry and giving spin‐Hamilton parameters b 2 0= + 1853 × 10 −4 cm −1 ,b 4 3= (±)2.6 × 10 −4 cm −1 . The model of Newman and Urban has been applied to estimate b 2 0for various local arrangements and these are compared with the experimental values of all three axial centres reported so far for Gd 3+ in CdS.