Authors

Citation

Rvg. Rao et R. Venkatesh, METHODS OF EVALUATION OF 2ND GRUNEISEN CONSTANT AND ANDERSON-GRUNEISEN CONSTANT, Journal of physics and chemistry of solids, 58(6), 1997, pp. 939-945

Citations number

29

Language

INGLESE

art.tipo

Article

Categorie Soggetti

Physics, Condensed Matter",Chemistry

Journal title

ISSN journal

0022-3697

Volume

58

Issue

6

Year of publication

1997

Pages

939 - 945

Database

ISI

SICI code

0022-3697(1997)58:6<939:MOEO2G>2.0.ZU;2-Y

Abstract

The second Gruneisen constant Q = [partial derivative 1n gamma(g)/part
ial derivative 1n V](T) and Anderson-Gruneisen constant delta(T)[=(1/a
lpha K-T)partial derivative K-T/partial derivative T](P) have been the
subject of various investigations. In this paper we calculate gamma(g
)' = (partial derivative gamma(g)/partial derivative P)(T),c(1)' = (pa
rtial derivative c(1)/partial derivative P) = {partial derivative/part
ial derivative P(partial derivative K-T/partial derivative P)}(T), Q a
nd delta(T) for Cd, As2S3 and C-60 Thurston's method, the Delanoy Cout
ris method, Bardeen's potential function and the Girifalco potential f
unction (GPF) to derive these properties. Four methods have been appli
ed for Cd in the evaluation of gamma(g)'. The results obtained by thre
e methods agree very well, while that from the fourth method is found
to give a higher value. A relation between gamma(g)' and Q has been de
rived. We also compute these properties for As2S3 and C-60. In this co
nnection, we point out that the present methods give reasonably good v
alues consistent with each other. It is interesting to note that gamma
(g)(th) obtained via the GPF scheme and that given by White et al [29]
are in close agreement with each other and therefore used in the eval
uation of Q. We used the value of White et al. for gamma(g)(th) (exter
nal). (C) 1997 Elsevier Science Ltd.