Investigation on magnetic critical behavior related to its magnetocaloric effect in Mn0.5Zn0.5Fe2O4 spinel ferrite

被引:9
作者
Anwar, M. S. [1 ,2 ]
Koo, Bon Heun [2 ]
机构
[1] Aligarh Muslim Univ, Dept Kulliyat, AK Tibbiya Coll, Aligarh 202002, Uttar Pradesh, India
[2] Changwon Natl Univ, Sch Mat Sci & Engn, Chang Won 641773, South Korea
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2022年 / 128卷 / 07期
基金
新加坡国家研究基金会;
关键词
Spinel ferrites; Magnetocaloric effect; Refrigeration capacity; Critical behavior; ROOM-TEMPERATURE; COOLING POWER; ENHANCEMENT; TRANSITION;
D O I
10.1007/s00339-022-05724-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this work, we have explored the magnetic critical behavior of Mn0.5Zn0.5Fe2O4 spinel ferrite related to their magnetocaloric properties. The X-ray diffraction analysis shows the sample crystallizes in the cubic system with Fd3m space group. The magnetization versus temperature measurement shows that the sample exhibits a paramagnetic (PM)-to-ferromagnetic (FM) transition at Curie temperature, T-C similar to 345 K. Additionally, Arrott plots and Landau theory were also studied to assess magnetic phase ordering in the present compound, and such investigations indicate that the phase transition from the PM to FM states is of second order. The maximum magnetic entropy change, vertical bar Delta S-M(max)vertical bar similar to 1.1 Jkg(-1) K-1 and refrigeration capacity, RC similar to 116 Jkg(-1) were observed under the applied field of H = 25 kOe. Also, an excellent agreement has been found between the magnetic entropy change estimated by the Landau theory and those obtained using the classical Maxwell relation. The critical behavior of the Mn0.5Zn0.5Fe2O4 has been studied by means of modified Arrott plot, Kouvel-Fisher method, critical isotherm, and Widom scaling. The as-obtained critical exponents [beta = 0.51 and gamma = 1.11 for MAP, beta = 0.48 and gamma = 1.07 for KF] indicate that the critical behavior of the present compound is close to the mean-field model.
引用
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页数:8
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