Effects of Fe substitution on Mn2Sn alloy on its structural, magnetic and magnetocaloric properties

被引：0

作者：

Felez, Marissol R. ^{[1
]}

Monteiro, José Carlos B. ^{[1
,4
]}

de Florio, Daniel Z. ^{[2
]}

Gandra, Flavio C.G. ^{[1
]}

Gama, Sergio ^{[3
]}

机构：

[1] Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas,SP,13083-859, Brazil

[2] Universidade Federal do ABC, Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas, São Paulo,SP,09210-580, Brazil

[3] Universidade Federal de São Paulo, Departamento de Ciências Exatas e da Terra, Diadema,SP,09910-720, Brazil

[4] Universidade Federal do Maranhão, Centro de Ciências Sociais Saúde e Tecnologia (CCSST), Imperatriz,MA,65900-410, Brazil

来源：

Journal of Magnetism and Magnetic Materials | 2020年 / 505卷

基金：

巴西圣保罗研究基金会;

关键词：

Magnetic refrigeration - Heat flux - Spectrometers - Tin alloys - Toxic materials - Saturation magnetization - Rare earths - Binary alloys - Manganese alloys;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The effects of Fe substitution on Mn site of Mn2Sn compound was investigated by means of scanning electron microscopy with X-ray energy dispersive spectrometer, X-ray diffraction, magnetization and magnetocaloric measurements. The produced Mn2−yFeySn series (0.50 ≤ y ≤ 1.75) presented two phases, a major non-stoichiometric Mn2−xSn and a minor Mn3Sn, respectively, with Fe content replacing Mn in each phase. The lattice parameters a and c of Mn2−xSn and Mn3Sn phases decrease approximately linearly with Fe concentration while their transition temperatures increase covering a wide temperature range from 177 K to 546 K (major phase TC1) and 260 K to 704 K (minor phase TC2) resulting in alloys with two distinct values of TC. The magnetization measurements show a ferromagnetic coupling and saturation magnetization increases along the series. The heat flux analyses determined second order of magnetic transitions and magnetocaloric effect was calculated with |ΔS| around 1 J/kg.K. The cooling power was estimated in 85 J/kg. Both values were for µ0ΔH = 2 T. Thereby, for technological devices which have their efficient improved using layered materials, Mn2−yFeySn alloys are valid candidates since the association of its properties allow to yield a powerful magnetic and magnetocaloric material, and, besides, they are low cost, non-toxic, absent of rare-earth and easy to manufacture. © 2020 Elsevier B.V.

引用