Abstract
The (La1-xNdx)(2/3)(Ca1-ySry)(1/3)MnO3 have been elaborated by the solid-state method and checked by X-ray diffraction. Close to magnetic temperature transition, the order transition and the critical behavior are investigated by dc magnetization measurements versus x and y compositions. Using various techniques such as modified Arrott plots, Kouvel-Fisher method, and Widom scaling relation, the values of T-C ferro-magnetic transition temperature, as well as the beta, gamma and delta critical exponents are estimated. The scaling plots show that the obtained values of the critical exponents are reliable. As main results, metamagnetic behavior and Griffiths phase were observed in these compounds pointing out to unconventional critical exponent. (C) 2013 Elsevier B.V. All rights reserved.