Critical behavior of the specific heat of manganites La1-xAgxMnO3 (x=0.1,0.15,0.2) near the Curie point.

An investigation of the critical behavior of the specific heat of the manganites La_1-xAg_xMnO₃ ×(x=0.1,0.15,0.2) near the Curie temperature is carried out. The behavior of the universal critical parameters near the phase transition point is established. All of the samples studied correspond to the ferromagnetic Heisenberg 3D universality class of critical behavior, with the critical exponent α=-0.115, -0.106, and -0.106 for La_0.9Ag_0.1MnO₃, La_0.85Ag_0.15MnO₃, and La_0.8Ag_0.2MnO₃, respectively. It is shown that the universality class of the critical behavior of the specific heat of the manganites La_1-xAg_xMnO₃ is independent of the silver concentration. [ABSTRACT FROM AUTHOR]