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Many‐Body Effects on the Third‐Order Elastic Constants of Alkaline Earth Fluorides
Author(s) -
Bedi S. S.,
Verma M. P.
Publication year - 1980
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.2220970122
Subject(s) - alkaline earth metal , fluorite , constant (computer programming) , order (exchange) , chemistry , third order , thermodynamics , mineralogy , physics , alkali metal , computer science , organic chemistry , philosophy , theology , finance , economics , programming language
Expressions for the third‐order elastic (TOE) constants are derived from the Lundqvist potential for the non‐centrosymmetric solids crystallizing in the fluorite structure. The values of the TOE constants determined from these expressions agree fairly well with the measured values for CaF 2 , SrF 2 , and BaF 2 and show significant improvements over the values obtained in other theoretical studies.