University of Tehran
Journal of Sciences, Islamic Republic of Iran
10161104
4
1
1993
03
01
EFFECT OF THE NEXTNEAREST NEIGHBOR
INTERACTION ON THE ORDERDISORDER
PHASE TRANSITION

31157
EN
Journal Article
1970
01
01
In this work, one and twodimensional lattices are studied theoretically by a
statistical mechanical approach. The nearest and nextnearest neighbor interactions
are both taken into account, and the approximate thermodynamic properties of the
lattices are calculated. The results of our calculations show that: (1) even though the
nextnearest neighbor interaction may have an insignificant effect on the entropy of
either the almost purely ordered or disordered phase, it does have a significant effect
on the entropy of the lattice when the orderdisorder transition is taking place. (2) The
nextnearest neighbor interaction broadens the range of temperature on which the
transition occurs. (3) The transition takes place more slowly with respect to temperature,
when the nextnearest neighbor interaction is considered.(4) The average
temperature, at which the transition occurs, shifts to a higher one when there is an
increase in the nextnearest neighbor interaction
https://jsciences.ut.ac.ir/article_31157_111edbe947bd4393bce714a9f51c69f4.pdf