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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
S. Guha, R. Kumar, S. Kumar, L. K. Pradhan, R. Pandey, M. Kar 
Corresponding Authors:
M. Kar 
DOI #:
https://doi.org/10.1016/j.jmmm.2019.166213 
Title:
Crystal structure and magnetic properties study on ferromagnet Fe2MnSi0. 75Al0. 25 Heusler alloy 
Journal:
Physica B: Condensed Matter 
Year:
2020 
Volume:
579 
Page:
411805 
Keywords:
Heusler alloy, Curie temperature, Arrott plot, Critical exponent 
Abstract:
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 L21 structure in Fm3m 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 transi-tion. Here values obtained for critical exponents (β¼0:5284​;γ¼1:084;δ¼3:05336​) 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 (2.4317μB/f.u.) at 50 K 
Entered by:
Venkata Dantham on 2020-08-02 
 
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