Magnetic behavior of ordered DO3-type Fe3Al Heusler alloy

被引：6

作者：

Kumar, R. Naveen ^{[1
]}

Koppolu, Uma Mahendra Kumar ^{[1
]}

Rajasabai, Senthur Pandi ^{[1
]}

机构：

[1] Vellore Inst Technol, Sch Adv Sci, Dept Phys, Vellore 632014, India

来源：

MATERIALS TODAY-PROCEEDINGS | 2022年 / 65卷

关键词：

DO3 Heusler alloy; Fe3Al; Critical exponents; Thermomagnetic behavior; Curie temperature;

D O I：

10.1016/j.matpr.2022.05.553

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees C for 1 hr, further at 500 degrees 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 (T-c), heat flow, and heat capacity (C-p) are measured from DSC. We have observed the magnetic transition at a temperature of 925 degrees K with an applied magnetic field of 5000 Oe. The saturation magnetization (M-r) is found to be 188 emu/g, and remanence magnetization (M-s) 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. (C) 2022 Elsevier Ltd. All rights reserved.

引用

页码：157 / 162

页数：6

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