Author:
Laajimi Kawther,Hichem Gazzah Mohamed,Dhahri Jemai
Abstract
In order to study the critical behavior of La0.67Ca0.18Sr0.15Mn0.98Ni0.02O3 near room temperature, magnetization measurements were performed. It can be seen from the findings that the specimens show a second order phase transition. Given the relative slope, the 3D-Ising model was deduced as the most suitable model. It was found that the evaluated critical exponents were β = 0.320, γ = 1.296 and δ = 4.965 at TC = 319 K. These verify the Broadom’s scaling equation δ = 1 + γ/β, which demonstrates that our values have been proved valid. Near TC magnetization-strength-temperature, (M-μ0H-T) results fell in two curves according to critical exponents, obeying the single scaling equation Mμ0Hε=εβʄ±μ0H/εβ+γ with ε=T−Tc/Tc as the reduced temperature.