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 ∼ 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 ( ∼ −0.5 J/kg K) at the antiferromagnetic to ferromagnetic transition for the same field change.
Funding
Giant Magnetocaloric Materials and Room Temperature Refrigeration
Wang, J. L., Campbell, S. J., Zeng, R., Poh, C., Dou, S. Xue. Kennedy, S. J. (2009). Re-entrant ferromagnet PrMn2Ge0.8Si1.2: Magnetocaloric effect. Journal of Applied Physics, 105 (7), 07A909-1-07A909-3.