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The study investigates the critical behavior of La0.8Ca0.2Mn1−xCoxO3 compounds with varying Co doping levels (x = 0, 0.1, 0.2, 0.3) through magnetic measurements near their critical temperature. It finds that the undoped compound exhibits a first-order phase transition, while all doped samples show a second-order transition, with critical exponents consistent with the 3D-Heisenberg model. The research highlights the sensitivity of magnetic properties to Co substitution and the importance of critical exponen

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rnou58173

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EN