Lin Luo , Hongxian Shen , Lunyong Zhang , Zhiliang Ning , Jianfei Sun , Manh-Huong Phan
{"title":"The effect of metal/non-metal ratio on the microstructure and magnetic properties of (MnFe)x(P0.5Si0.5) microwires","authors":"Lin Luo , Hongxian Shen , Lunyong Zhang , Zhiliang Ning , Jianfei Sun , Manh-Huong Phan","doi":"10.1016/j.pnsc.2024.08.004","DOIUrl":null,"url":null,"abstract":"<div><div>The effects of metal/non-metal ratio (M/NM = <em>x</em>: 1) on the microstructure and magnetocaloric properties of promising melt-extracted Mn–Fe–P–Si microwires with short heat treatment have been investigated here. More Fe<sub>2</sub>P principal phase, which is considered favorite for magnetocaloric effect (MCE), should achieve at low M/NM ratio and the fraction of Fe<sub>2</sub>P phase increased with the reduction of <em>x</em>. Meanwhile, the (Mn, Fe)<sub>3</sub>Si impurity phase is formed for <em>x</em> = 2.00–1.90 whereas change to (Mn, Fe)<sub>5</sub>Si<sub>3</sub> structure for <em>x</em> = 1.85. It's worth noting that a metal deficiency resulted in the thermal hysteresis (<em>T</em><sub>hys</sub>) and the magnetic hysteresis loss (<em>W</em><sub>y</sub>) decreased by ∼40 %., The magnetic transition temperature (<em>T</em><sub>tran</sub>), peak value of isothermal magnetic entropy change (−<span><math><mrow><mo>Δ</mo><msubsup><mi>S</mi><mtext>iso</mtext><mtext>peak</mtext></msubsup></mrow></math></span>), refrigerant capacity (<em>RC</em>) and effective refrigerant capacity (<em>RCE</em>) first increased then decreased with the decrease of <em>x</em>, and reached the maximums at <em>x</em> = 1.90, i.e., 370 K, 26.0 J kg<sup>−1</sup> K<sup>−1</sup>, 367.4 and 339.8 J kg<sup>−1</sup>, respectively. Therefore, the customizable microstructure and magnetic properties of the melt-extracted (MnFe)<sub><em>x</em></sub>(P<sub>0.5</sub>Si<sub>0.5</sub>) microwires will be achievable effectively by tuning M/NM ratio <em>x</em>, and optimized Mn–Fe–P–Si compounds with novel thermomagnetic properties will be obtained.</div></div>","PeriodicalId":20742,"journal":{"name":"Progress in Natural Science: Materials International","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Natural Science: Materials International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1002007124001904","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The effects of metal/non-metal ratio (M/NM = x: 1) on the microstructure and magnetocaloric properties of promising melt-extracted Mn–Fe–P–Si microwires with short heat treatment have been investigated here. More Fe2P principal phase, which is considered favorite for magnetocaloric effect (MCE), should achieve at low M/NM ratio and the fraction of Fe2P phase increased with the reduction of x. Meanwhile, the (Mn, Fe)3Si impurity phase is formed for x = 2.00–1.90 whereas change to (Mn, Fe)5Si3 structure for x = 1.85. It's worth noting that a metal deficiency resulted in the thermal hysteresis (Thys) and the magnetic hysteresis loss (Wy) decreased by ∼40 %., The magnetic transition temperature (Ttran), peak value of isothermal magnetic entropy change (−), refrigerant capacity (RC) and effective refrigerant capacity (RCE) first increased then decreased with the decrease of x, and reached the maximums at x = 1.90, i.e., 370 K, 26.0 J kg−1 K−1, 367.4 and 339.8 J kg−1, respectively. Therefore, the customizable microstructure and magnetic properties of the melt-extracted (MnFe)x(P0.5Si0.5) microwires will be achievable effectively by tuning M/NM ratio x, and optimized Mn–Fe–P–Si compounds with novel thermomagnetic properties will be obtained.
期刊介绍:
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