Magnetic behavior of ordered DO3-type Fe3Al Heusler alloy

Fe3Al alloy is synthesized in a vacuum arc-melting furnace under an argon atmosphere. The prepared ingot is annealed in a vacuum furnace at 800 °C for 1hr, further at 500 °C for 48 hrs to facilitate the re-crystallization. The alloys are crystallized in a cubic DO3 structure. The magnetic properties...

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Bibliographic Details
Main Authors: Naveen Kumar, R., Koppolu, Uma Mahendra Kumar, Rajasabai, Senthur Pandi
Format: Conference Proceeding
Language:English
Subjects:
Critical exponents
Curie temperature
DO3 Heusler alloy
Fe3Al
Thermomagnetic behavior
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Summary:Fe3Al alloy is synthesized in a vacuum arc-melting furnace under an argon atmosphere. The prepared ingot is annealed in a vacuum furnace at 800 °C for 1hr, further at 500 °C for 48 hrs to facilitate the re-crystallization. The alloys are crystallized in a cubic DO3 structure. The magnetic properties are derived from M−H, and M−T measurements and the thermal properties like transition temperature (Tc), heat flow, and heat capacity (Cp) are measured from DSC. We have observed the magnetic transition at a temperature of 925°K with an applied magnetic field of 5000 Oe. The saturation magnetization (Ms) is found to be 188 emu/g, and remanence magnetization (Mr) of 0.78 emu/g. From M−T and DSC measurements it appears that the samples have ferromagnetic ordering with second-order phase transition. The critical exponent is derived by applying mean-field, 3D-Heisenberg, 3D-Ising, and tricritical models.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2022.05.553