About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
High-Entropy Materials: Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond VI
|
| Presentation Title |
Co-existence of ferro-antiferromagnetism and transport properties in Fe2MnAl Heusler Alloy |
| Author(s) |
Aparna Ashok, Neeru Bhagat |
| On-Site Speaker (Planned) |
Aparna Ashok |
| Abstract Scope |
Heusler alloys find their applications as sensors, actuators, energy harvesters, and as magnetic cooling devices. For the current study, polycrystalline ingots of Fe2MnAl samples were prepared by conventional arc melting stoichiometric amounts of constituent elements in a high-purity argon atmosphere and annealed at 800℃. These alloys exhibited a distinct magnetic transformation at around 54 K, attributed to antiferromagnetic pinning within a ferromagnetic matrix. The mixed state incorporates ferromagnetic and antiferromagnetic parts for which close-lying Curie (TC) and Néel (TN) temperatures can be identified from magnetization measurements. X-ray diffraction analyses unveiled a coexisting mixed L21 and B2 state. Magnetization measurements, conducted under zero field cooled (ZFC) and field-cooled (FC) conditions, emphasized this intriguing behavior. Noteworthy results included a semiconducting property below ~120 K (TC) and metallic behavior above, as evidenced by temperature-dependent resistivity. Remarkably, a negative magnetoresistance arising from inhomogeneous magnetic scattering was observed within the 5-200 K range. |