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A Calculation of the Spin–Lattice Coefficients of Gd 3+ in CaO, CaF 2 , Tho 2 , and CeO 2
Author(s) -
Schlottmann P.
Publication year - 1972
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.2220510249
Subject(s) - tetragonal crystal system , trigonal crystal system , ion , lattice (music) , lattice energy , condensed matter physics , crystal structure , order (exchange) , physics , atomic physics , analytical chemistry (journal) , materials science , chemistry , crystallography , quantum mechanics , acoustics , finance , chromatography , economics
The contributions of three mechanisms to second‐order spin‐lattice coefficients of Gd 3+ in CaO, CaF 2 , Tho 2 , and CeO 2 , are calculated with a point‐charge approach for the orbit‐lattice parameters. It is seen that for Gd 3+ the Blume and Orbach mechanism has not the importance as for the 3d 5 ions, Mn 2+ and Fe 3+ . With the Blume and Orbach mechanism, a relativistic second‐order and a mechanism of fourth order a sign agreement for both coefficients of Gd 3+ in CaO and for the tetragonal coefficient in the other lattices is obtained, but not for the trigonal distortions.