Summary
The effect of disordering, particularly Cr clustering on the magnetic properties in bulk and nanosized Heusler alloy Fe2CrAl has been studied using a combination of X-ray diffraction, 57Fe Mössbauer spectroscopy, and DC magnetization. The structural order/disorder has been confirmed using Mössbauer spectroscopy, and the observed bulk magnetic properties have been correlated to these results. Mechanical milling of the bulk alloys result in a more even distribution of Cr, reducing the clustering and hence enhancing the bulk magnetic properties with nearly no change in the Curie temperature (TC). Mechanical alloying of elemental Fe, Cr, and Al give rise to a highly disordered system with higher saturation moment, retentivity, and very enhanced TC.
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Lakshmi, N., Sebastian, V., Venugopalan, K. (2009). Clustering in Heusler Alloys. In: Aktas, B., Mikailov, F. (eds) Advances in Nanoscale Magnetism. Springer Proceedings in Physics, vol 122. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69882-1_2
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