The magnetic and structural transitions can be controlled to coincide by partial substitution of Zn for Co in MnCo1-xZnxGe, leading to a large magnetocaloric effects over a wide temperature range. The magnetostructural transition from paramagnetic to ferromagnetic state results in magnetic entropy changes (-ΔSM) of 26 J/kg K at 327 K for ΔH 5 T in the case of x 0.045. Interestingly, a structurally driven first-order phase transition between two high magnetization states as observed for x 0.05 and 0.06 also lead to large values of -ΔSM 31.4 and 20.6 J/kg K for ΔH 5 T at 281 and 209 K, respectively. The observed large magnetocaloric effects with tunable phase transition temperatures make these materials promising for near room-temperature magnetic cooling applications. © 2013 American Institute of Physics.
Publication Source (Journal or Book title)
Journal of Applied Physics
Samanta, T., Dubenko, I., Quetz, A., Stadler, S., & Ali, N. (2013). Large magnetocaloric effects over a wide temperature range in MnCo 1-xZnxGe. Journal of Applied Physics, 113 (17) https://doi.org/10.1063/1.4798339