Room temperature magnetocaloric effect in Pr1.75Sr1.25Mn2O7 double-layered perovskite manganite system |
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| Authors: | Ali Osman Ayaş Mustafa Akyol Selda Kılıç Çetin Melike Kaya İlker Dinçer Ahmet Ekicibil |
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| Affiliation: | 1. Faculty of Technology, Department of Mechatronics Engineering, Ad?yaman University, Ad?yaman, Turkeyaayas@adiyaman.edu.tr;3. Faculty of Sciences and Letters, Department of Physics, ?ukurova University, Adana, Turkey;4. Faculty of Engineering, Department of Physics Engineering, Ankara University, Ankara, Turkey |
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| Abstract: | AbstractIn this work, we have studied on double-layered perovskite (Ruddlesden–Popper) manganite structure in Pr1.75Sr1.25Mn2O7 synthesised by sol–gel method. The crystal structure of the double-layered perovskite is found as tetragonal from the X-ray diffraction analysis with I4/mmm space group. A high Curie temperature, TC = 305 K is observed from the temperature dependence of magnetisation measurement. The isothermal magnetisation curves showed that magnetic phase transition is second order due to the positive slope of the Arrott plots. Maximum magnetic entropy change (ΔSM) and adiabatic temperature change (ΔTad) values are calculated as 3.99 J kg?1 K?1 and 2.1 K under external magnetic field of 70 kOe, respectively. Since our double-layered perovskite manganite sample has desired TC value and relatively high ΔSM, it can be a potential candidate as a magnetocaloric material for room temperature magnetic cooling systems. |
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| Keywords: | Magnetism magnetic materials magnetic phase transition magnetocaloric effect magnetic entropy change Curie temperature |
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