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Influence of Barium Doping on the Magnetic and Magnetocaloric Properties of Pr1−x Ba x MnO3

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Abstract

Polycrystalline samples of the Pr1−xBaxMnO3 were prepared by solidstate synthesis method. Effects of A site barium doping on the magnetocaloric effect of Pr1−xBaxMnO3 have been investigated. X-ray diffraction patterns indicate that these samples have orthorhombic structure with the Pbnm space group. By varying, the concentration of alkaline earth dopant on the A site, magnetization behavior and Curie temperature Tc has been examined. Above 40 % doping of barium, a combination antiferromagnetic (AFM)–ferromagnetic (FM) cluster arises which suppress the magnetocaloric effect in the sample. The maximum magnetization obtained is 47 emu/g at 166 K, for 40 % of barium concentration with the highest Tc of 195 K. The highest value of magnetic entropy \(\left |{\Delta } S\right |\) and relative cooling power (RCP) obtained was 2.4 J/kg/K and 81.70 J/kg, respectively.

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Acknowledgments

This research was supported by Basic Science Research Program through National Research Foundation of Korea (NRF) funded by Ministry of Education, Science and Technology(2012-R1A1B3000784). This research was also also supported by the National Research foundation of Korea (NRF) funded by the Korean Government(MEST) (2011-0030058).

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  1. School of Materials Science and Engineering, Changwon National University, Changwon, 641-773, South Korea

    Zeeshan Ur Rehman, M. S. Anwar & Bon Heun Koo

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  1. Zeeshan Ur Rehman
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  2. M. S. Anwar
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  3. Bon Heun Koo
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Correspondence to Bon Heun Koo.

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Ur Rehman, Z., Anwar, M.S. & Koo, B.H. Influence of Barium Doping on the Magnetic and Magnetocaloric Properties of Pr1−x Ba x MnO3 . J Supercond Nov Magn 28, 1629–1634 (2015). https://doi.org/10.1007/s10948-014-2933-1

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