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Magnetic phase diagram of the mnx fe2−x p1−y siy system

Journal Article (2022)
Author(s)

Xinmin You (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Michael Maschek (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Niels Harmen H. van Dijk (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Ekkes Brück (TU Delft - RST/Fundamental Aspects of Materials and Energy)

Research Group
RST/Fundamental Aspects of Materials and Energy
DOI related publication
https://doi.org/10.3390/e24010002
More Info
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Publication Year
2022
Language
English
Research Group
RST/Fundamental Aspects of Materials and Energy
Issue number
1
Volume number
24
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Abstract

The phase diagram of the magnetocaloric Mnx Fe2−x P1−y Siy 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 (Mn0.3 Fe1.7 P0.6 Si0.4, TC = 470 K) is found for low Mn and high Si contents, while the lowest is found for low Fe and Si contents (Mn1.7 Fe0.3 P0.6 Si0.4, TC = 65 K) in the Mnx Fe2−x P1−y Siy 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.