首页> 外文期刊>Journal of magnetism and magnetic materials >Design of high resistivity light-rare-earth-based PrFe_(1.93) magnetostrictive alloys: Si doping and high-pressure annealing
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Design of high resistivity light-rare-earth-based PrFe_(1.93) magnetostrictive alloys: Si doping and high-pressure annealing

机译:高电阻率稀土基PrFe_(1.93)磁致伸缩合金的设计:Si掺杂和高压退火

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摘要

Light-rare-earth-based Pr (Fe1-xSix)(1.93) alloys (0 = x = 0.1) with pure cubic Laves phase were synthesized by high pressure annealing method. Si substitution effects on magnetic, electrical and magnetostrictive properties of light-rare-earth-based Pr(Fe1-xSix)(1.93 ) alloys were systematically investigated. It was found that the lattice parameter a and Curie temperature T-c of the cubic Laves phase in the alloys increase with the increasing Si content up to x = 0.05, which might be ascribed to the preferential occupation of Si in the Laves phase interstitial sites. The magnetization at the maximum available field of 15 kOe, sigma(15k), decreases monotonically with the increasing x. A significant increase of 67% in electrical resistivity was observed in Pr (Fe0.9Si0.1)(1.93 ) alloy at room temperature. The magnetostriction at the field of 3 kOe of Pr (Fe0.95Si0.05)(1.93) is about 542 ppm, which is even larger than the saturation magnetostriction of heavy-rare-earth-based Tb0.2Dy0.22Ho0.58Fe2 single crystal (lambda(s)= 530 ppm). The attractive price, lower eddy current loss, together with high magnetostrictive response suggest that the Pr (Fe0.95Si0.05)(1.93 )alloy might be a good candidate material for the potential magnetostrictive applications.
机译:采用高压退火法合成了纯立方拉夫斯相的轻稀土Pr(Fe1-xSix)(1.93)(1.93)合金(0 <= x <= 0.1)。系统地研究了硅替代对稀土类Pr(Fe1-xSix)(1.93)合金的磁,电和磁致伸缩性能的影响。发现合金中立方Laves相的晶格参数a和居里温度T-c随着Si含量的增加而增加,直至x = 0.05,这可能归因于Laves相间隙位置中Si的优先占有。随着x的增加,在15 kOe的最大可用磁场sigma(15k)处的磁化强度单调降低。在室温下,在Pr(Fe0.9Si0.1)(1.93)合金中观察到电阻率显着增加67%。 Pr(Fe0.95Si0.05)(1.93)的3 kOe场处的磁致伸缩约为542 ppm,甚至大于重稀土基Tb0.2Dy0.22Ho0.58Fe2单晶的饱和磁致伸缩(λ= 530ppm)。诱人的价格,较低的涡流损耗以及较高的磁致伸缩响应表明Pr(Fe0.95Si0.05)(1.93)合金可能是潜在磁致伸缩应用的良好候选材料。

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