Magnetic phase diagram of the mn_x fe_2−x p_1−y si_y system

Magnetic phase diagram of the mn_x fe_2−x p_1−y si_y system

You, X. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Maschek, M. (TU Delft RST/Fundamental Aspects of Materials and Energy)
van Dijk, N.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)
Brück, E.H. (TU Delft RST/Fundamental Aspects of Materials and Energy)

2022

The phase diagram of the magnetocaloric Mn_x Fe_2−x P_1−y Si_y quaternary compounds was established by characterising the structure, thermal and magnetic properties in a wide range of compositions (for a Mn fraction of 0.3 ≤ x < 2.0 and a Si fraction of 0.33 ≤ y ≤ 0.60). The highest ferromagnetic transition temperature (Mn_0.3 Fe_1.7 P_0.6 Si_0.4, T_C = 470 K) is found for low Mn and high Si contents, while the lowest is found for low Fe and Si contents (Mn_1.7 Fe_0.3 P_0.6 Si_0.4, T_C = 65 K) in the Mn_x Fe_2−x P_1−y Si_y phase diagram. The largest hysteresis (91 K) was observed for a metal ratio close to Fe:Mn = 1:1 (corresponding to x = 0.9, y = 0.33). Both Mn-rich with high Si and Fe-rich samples with low Si concentration were found to show low hysteresis (≤2 K). These compositions with a low hysteresis form promising candidate materials for thermomagnetic applications.

Magnetic entropy
Magnetocaloric materials
Mn-Fe-P-Si
Phase diagram
Thermal hysteresis
Transition temperature

http://resolver.tudelft.nl/uuid:b9b864de-269b-4ca4-bda6-24de2a3af0e1

https://doi.org/10.3390/e24010002

1099-4300

Entropy: international and interdisciplinary journal of entropy and information studies, 24 (1)

Institutional Repository

journal article

© 2022 X. You, M. Maschek, N.H. van Dijk, E.H. Brück