Crystal structure and magnetic properties study on ferromagnet Fe2MnSi0.75Al0.25 Heusler alloy

被引：4

作者：

Guha, Shampa ^{[1
]}

Kumar, Rajnish ^{[2
]}

Kumar, Sunil ^{[1
]}

Pradhan, Lagen Kumar ^{[1
]}

Pandey, Rabichandra ^{[1
]}

Kar, Manoranjan ^{[1
]}

机构：

[1] Indian Inst Technol Patna, Dept Phys, Bihta 801103, India

[2] Anugrah Narayan Singh Coll, Patna 803213, Bihar, India

来源：

PHYSICA B-CONDENSED MATTER | 2020年 / 579卷

关键词：

Heusler alloy; Curie temperature; Arrott plot; Critical exponent; MAGNETOCRYSTALLINE ANISOTROPY; ELECTRONIC-STRUCTURE; SUBSTITUTION;

D O I：

10.1016/j.physb.2019.411805

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Full Heusler alloy Fe2MnSi0.75Al0.25 has been prepared by the arc melting method with proper stoichiometry followed by nitrogen atmosphere annealing. Structural and magnetic characterizations have been carried out. X-ray diffraction data analysis reveals that this alloy crystallizes to L2(1) structure in Fm (3) over barm space group. It exhibits ferromagnetic behavior below Curie temperature. Curie temperature is found to be around 290 K. The Kouvel-Fisher plot and the Arrott plot have been employed to understand the nature of para to ferromagnetic transition. Here values obtained for critical exponents (beta = 0:5284; gamma = 1:084; delta = 3:05336) are convergent with the mean-field model. Law of Approach (LA) to saturation magnetization has been employed to obtain the saturation magnetization and it is found to be maximum (2.4317 mu(B)/f.u.) at 50 K.

引用

页数：6

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