Abstract
La0.63Gd0.37MnO3 material was synthesized using the Pechini-modified-sol–gel method at different sintering temperatures 600, 650, 750, 800, and 900 °C. After characterizing the samples structurally and magnetically, we report a direct relation between the crystallite size, particles agglomeration level, and material performance in field-cooling/zero-field-cooling magnetization modes, in addition to an inverse relation between the existence of Griffith phase and the samples’ magneto-caloric performance. The material sintered at 800 °C presents the maximum isothermal entropy change among others that is 7.57 J kg−1 K−1 at 7 T, in addition to a good performance shown at higher temperatures, making it a promising candidate for different cooling applications.
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Acknowledgements
This publication was made possible by an Award [GSRA5-2-0510-18049] from Qatar National Research Fund (a member of Qatar Foundation). The contents herein are solely the responsibility of the authors. The authors would like to acknowledge the contribution of Core Labs group supervised by Dr. Said A. Mansour in Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University, Qatar Foundation, especially, Dr. Akshath Raghu Shetty for carrying out the XRD measurements, Dr. Mujaheed Pasha and Mr. Mohamed I. Helal for conducting the SEM images.
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Rasras, A., Hamdi, R., Mansour, S. et al. Effects of the sintering temperature on the La0.63Gd0.37MnO3 structure and magnetic properties. Appl. Phys. A 126, 838 (2020). https://doi.org/10.1007/s00339-020-04032-0
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DOI: https://doi.org/10.1007/s00339-020-04032-0