Pershan, PeterProst, J.2013-03-041979Pershan, Peter S., and J. Prost. 1979. Landau theory of the reentrant nematic-smectic A phase transition. Journal de Physique 40(2): 27-30.1155-4339http://nrs.harvard.edu/urn-3:HUL.InstRepos:10361975The reentrant, nematic to smectic A phase transition is shown to follow from the Landau theory if one assumes the existence of an optimum density for smectic ordering. The shape of the coexistence line in the P-T plane is fit exactly by this theory. The effects of concentration on reentrant behaviour are also explained.en-USliquid crystal phase transformationsnematic liquid crystalssmectic liquid crystalsLandau theoryoptimum densitysmectic orderingcoexistence lineP T planeconcentrationreentrant behaviourreentrant nematic to smectic A phase transitionJournal Article2013-03-0410.1051/jphyslet:0197900400202700