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.
Part of the book: Recent Advances in Multifunctional Perovskite Materials