title: A-site-deficiency effect on critical behavior in the Pr0.6Sr0.4MnO3 compound.
abstract: We present the effect of vacancy in Pr0.6Sr0.4MnO3via dc magnetisation measurements. Using various techniques such as modified Arrott plots, the Kouvel-Fisher method, and Widom scaling relationship the values of TC (ferromagnetic transition temperature), as well as the β, γ and δ (critical exponents) are estimated. Critical exponents for the stoichiometric sample and the strontium deficient sample match well with those predicted for the tricritical mean field model. The vacancy in Pr0.5□0.1Sr0.4MnO3 changes the universal class. The estimated critical exponents of the praseodymium deficient sample are close to those found out by the 3D-Ising model.
authors.affiliation: Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, Université de Sfax B. P. 1171, 3000 SFAX, TUNISIE. essebti@yahoo.com.
authors.forename: F
authors.initials: F
authors.lastname: Elleuch
authors.forename: M
authors.initials: M
authors.lastname: Bekri
authors.forename: M
authors.initials: M
authors.lastname: Hussein
authors.forename: M
authors.initials: M
authors.lastname: Triki
authors.forename: E
authors.initials: E
authors.lastname: Dhahri
authors.forename: E K
authors.initials: EK
authors.lastname: Hlil
authors.forename: L
authors.initials: L
authors.lastname: Bessais