Effect of magnetism and average radius at A-site on TC in Nd0.6Ln0.1Sr0.3MnO3 (Ln=La, Pr, Gd, Dy) system

The magnetic properties of Nd0.6Ln0.1Sr0.3MnO3 compositions (Ln = La, Pr, Gd, Dy) have been investigated thoroughly. The effect of 〈rA〉 is considered to be profound on the PM-FM phase transition in the manganites. The experiment results indicate that TC decreases with Ln changing from La to Gd due to the decreases of 〈rA〉. The abnormal increase of TC in Dy-composition with the smallest 〈rA〉 and largest σ2 is attributed to the large magnetic moment of Dy3+ ions. The rapid increase of magnetization below 30 K indicates directly the magnetic ordering of rare earth ions at A-site.