A Systematic Review on Magnetic Properties of Mn-Ni Based Full-Heusler Alloys

Abstract:Magnetic materials are becoming high demanding due to their suitable application in spintronic devices. Among the several magnetic materials, Heusler alloys have exhibited a great interest mainly due to their half metallic behavior along with high magnetic moments. Here, we report the rigorous analysis of Mn based full-Heusler magnetic materials as magnetic moment in these materials are found to be highly around the Mn elements. Magnetic moment of Mn in different Mn-based alloys has been listed in the table for the comparison. Therefore, experimental findings specifically on Mn₂NiSb have been critically reviewed in the subsequent section of this manuscript. However, several compensated ferrimagnetic and antiferromagnetic Heusler alloys have also been studied and few examples have also been given in order to show the multifunctionality of these alloys. Composites of half and full-Heusler have also been experimentally established with reducing their magnetic behavior.Effect of structure on the magnetic has also been revealed from the available literature. Specifically, structure of Mn₂NiSb full-Heusler alloy in their cubic, tetragonal and hexagonal form has been simulated and X-Ray diffraction data are plotted for each. Since, the magnetic behavior of these materials are intrinsically linked to their crystal structure and their respective sites. Any small change in their structure has significantly change their magnetic behavior. Therefore, transition from low temperature austenite to high temperature martensite phase have been exhibited which has revealed in the magnetization versus temperature data in zero field cooled and field cooled measurements. 

Keywords- Full-Heusler Alloys, Spintronic Application, Magnetic Moment, X-Ray Diffraction Data etc.