Re-entrant ferromagnet PrMn2Ge0.8Si1.2: magnetocaloric effect
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American Institute of Physics
Abstract
The structural and magnetic properties of the re-entrant ferromagnet PrMn2Ge0.8Si1.2 have been investigated by various experimental methods. Similar to the canonical re-entrant ferromagnet SmMn2Ge2, multiple magnetic phase transitions have been detected in PrMn2Ge0.8Si1.2 over the temperature range from 10 to 550 K with re-entrant ferromagnetism occurring around similar to 54 K. The magnetocaloric effect has been measured in terms of the isothermal magnetocaloric entropy change and found to be positive at the re-entrant ferromagnetic transition with a maximum value of around 1.9 J/kg K at 58 K for a magnetic field change of 0-3 T. On the other hand, the entropy change becomes negative (similar to-0.5 J/kg K) at the antiferromagnetic to ferromagnetic transition for the same field change. © 2009, American Institute of Physics
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Proceedings of the 53rd Annual Conference on Magnetism and Magnetic Materials, 10-14 November 2008, Austin, Texas (USA).
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Wang, J. L., Campbell, S. J., Zeng, R., Poh, C. K., Dou, S. X., & Kennedy, S. J. (2009). Re-entrant ferromagnet PrMn2Ge0.8Si1.2: magnetocaloric effect. Paper presented at the 53rd Annual Conference on Magnetism and Magnetic Materials, 10-14 November 2008, Austin, Texas (USA). Journal of Applied Physics, 105(7), 07A909. doi:10.1063/1.3059610