The critical behavior associated with the magnetic phase transition has been investigated by magnetization isotherms in La0.5Ca0.4 Ag0.1MnO3 (LCAMO) powder. The X-ray diffraction characterization has revealed that this sample crystallized in the orthorhombic symmetry with Pnma space group. While the experimental results revealed that this sample underwent a paramagnetic-ferromagnetic transition, the magnetic measurements data indicated that the compound exhibited a second-order phase transition. Furthermore, the critical exponents values were found as beta = 0.79, gamma = 0.71 and delta = 1.828 with T-C = 189.87 K. The relative cooling power of the sample was determined as 14.70 J/kg under a magnetic field of 1 T making it a potential working material in magnetic refrigeration. (C) 2018 Elsevier B.V. All rights reserved.