The thermomagnetic and magnetocaloric properties of the MnNiGe 1-xAl x system have been investigated by magnetization and differential scanning calorimetry (DSC) measurements. The presence of first-order magnetostructural transitions (MSTs) from hexagonal ferromagnetic to orthorhombic antiferromagnetic phases has been detected for x 0.085 and 0.09 at 193 K and 186 K, respectively. The values of latent heat (L 6.6 J/g) and corresponding total entropy changes (ΔS T 35 J/kg K) have been evaluated for the MST (x 0.09) from DSC measurements. The magnetic entropy change for x 0.09 (ΔS M 17.6 J/kg K for 5 T) was found to be comparable with well-known giant magnetocaloric materials, such as Gd 5Si 2Ge 2, MnFeP 0.45As 0.55, and Ni 50Mn 37Sn 13. © 2012 American Institute of Physics.
Publication Source (Journal or Book title)
Applied Physics Letters
Samanta, T., Dubenko, I., Quetz, A., Temple, S., Stadler, S., & Ali, N. (2012). Magnetostructural phase transitions and magnetocaloric effects in MnNiGe 1-xAl x. Applied Physics Letters, 100 (5) https://doi.org/10.1063/1.3681798