| Popis: |
In this manuscript, we have studied the critical fluctuations in the vicinity of phase transition temperature in the Y-doped La0.7Ca0.3MnO3 manganite compound. Details magnetization measurements were carried out to study the critical fluctuations involving modified Arrott plot, Kouvel-Fisher method, critical isotherm analysis and Widom scaling relation. The compound shows a second-order magnetic phase transition near the critical point. The reliability and self-consistency of the obtained critical exponents are further verified by the magnetic equation of state. The obtained value of critical exponents are indicative of mean field theory which suggest the presence of long range ordered ferromagnetic exchange interaction in the studied (La1-xYx)0.7Ca0.3MnO3 (x= 0.4) compound. |
