You Xinmin, Maschek Michael, van Dijk Niels Harmen H, Brück Ekkes
Fundamental Aspects of Materials and Energy (FAME), Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands.
Entropy (Basel). 2021 Dec 21;24(1):2. doi: 10.3390/e24010002.
The phase diagram of the magnetocaloric MnFePSi 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 ≤ < 2.0 and a Si fraction of 0.33 ≤ ≤ 0.60). The highest ferromagnetic transition temperature (MnFePSi, = 470 K) is found for low Mn and high Si contents, while the lowest is found for low Fe and Si contents (MnFePSi, = 65 K) in the MnFePSi phase diagram. The largest hysteresis (91 K) was observed for a metal ratio close to Fe:Mn = 1:1 (corresponding to = 0.9, = 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.
通过表征一系列成分（锰含量为0.3≤x＜2.0，硅含量为0.33≤y≤0.60）的结构、热性能和磁性能，建立了磁热效应MnFePSi四元化合物的相图。在MnFePSi相图中，低锰和高硅含量时发现了最高的铁磁转变温度（MnFePSi，Tc = 470 K），而低铁和低硅含量时（MnFePSi，Tc = 65 K）发现了最低的铁磁转变温度。对于接近Fe:Mn = 1:1的金属比例（对应于x = 0.9，y = 0.33），观察到了最大的磁滞（91 K）。发现富锰且高硅以及富铁且低硅浓度的样品都显示出低磁滞（≤2 K）。这些具有低磁滞的成分构成了热磁应用中有前景的候选材料。
