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Spin–Lattice Coupling Coefficients G ij for Trigonal Al 2 O 3 :Fe 3+ and ZnSiF 6 · 6H 2 O:Ni 2+ Crystals 2)
Author(s) -
Zheng WenChen
Publication year - 1990
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.2221610226
Subject(s) - trigonal crystal system , lattice (music) , condensed matter physics , symmetry (geometry) , coupling (piping) , crystallography , simple cubic lattice , cubic crystal system , spin (aerodynamics) , crystal structure , chemistry , materials science , physics , thermodynamics , mathematics , geometry , metallurgy , acoustics , statistics , monte carlo method
By expressing the six spin–lattice coupling coefficients G ij tin trigonal symmetry in terms of the coefficients G 11 cand G 44 cin cubic symmetry, the coefficients G ij tfor trigonal Al 2 O 3 : Fe 3+ and ZnSiF 6 · 6 H 2 O : Ni 2+ crystals are calculated from the values of G 11 cand G 44 cobtained from a simple and uniform method within the framework of cubic symmetry approximation. The results for the Al 2 O 3 : Fe 3+ crystal is in agreement with the experimental findings, whereas for ZnSiF 6 · 6 H 2 O : Ni 2+ , the agreement for part of coefficients is poor. The reasons for the disparity are discussed.