Article ID Journal Published Year Pages File Type
1617095 Journal of Alloys and Compounds 2011 4 Pages PDF
Abstract

The heat capacity of La0.87K0.13MnO3 manganite is measured in temperature intervals from 80 to 350 K. A nature of the ferromagnetic phase transition and critical properties of the heat capacity near Curie temperature are studied. The principles of change in universal critical parameters near a phase transition point are determined. The critical exponents and heat capacity amplitude are calculated with account of correction to the scaling α = −0.13, А+/А− = 1.178, and correspond to the critical behavior of 3D Heisenberg model. It is found a critical exponent of the correlation radius υ = 0.71, which is also conform to the Heisenberg universality class.

► A nature of the ferromagnetic phase transition and critical properties of the heat capacity near Curie temperature are studied. ► The principles of change in universal critical parameters near a phase transition point are determined. ► The obtained values of the critical parameters show that critical behavior of La0.87K0.13MnO3 manganite corresponds to the model of classical 3D Heisenberg ferromagnetic.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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