The obtaninig of the perovski̇te manganites by means of ball mi̇lli̇ng and their magnetic features

The purpose of the study is to examine the magnetocaloric features of the magnetic equipment and it is of great significance in terms of technological applications as well as the solution to the basic problems in magnetism and solid state physics. The essential purpose of the study is to obtain the LaCaMnO alloy in the nano size and then to examine the magnetic and magnetocalorik features of the perovskite samples in this size. The La2O3, CaCO3, MnO samples which have required purity were produced in our lab by using the Ball Milling. The structural features of the samples used in the study were determined by using the analysis of X- Rays Refraction Difraktometresi, SEM-EDAX. The magnetic features were determined by using Vibrating Sample Magnetometer (VSM) which has a range of 2-300K heat. In the lights of the results obtained, after the magnetocalorik features of the samples ground for certain hours were examined and their magnetic entropy changes and the dependence of these changes on the magnetic field were determined, the results were discussed. At the end of the study, the magnetic features, the magnetic entropy change and the magnetocalorik features of the LaCaMnO sample in the nano size obtained by grinding for certain hours were checked. A result was reached by comparing the magnetic and magnetocalorik features of the bulk samples of the same sample and the nano samples we obtained. The effects of the decreasing particle size on the magnetic and magnetocalorik features were obtained.