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Quantitative Atomic-Site Analysis of Functional Dopants/Point Defects in Crystalline Materials by Electron-Channeling-Enhanced Microanalysis
Published on: May 10, 2021
A-site-deficiency effect on critical behavior in the Pr0.6Sr0.4MnO3 compound
F Elleuch1, M Bekri, M Hussein
1Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, Université de Sfax B. P. 1171, 3000 SFAX, TUNISIE. essebti@yahoo.com.
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.
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