磁制冷
材料科学
熔融纺丝
金属间化合物
微晶
铁磁性
磁化
Laves相
等温过程
透射电子显微镜
结晶学
凝聚态物理
冶金
磁场
合金
复合材料
纺纱
热力学
纳米技术
化学
物理
量子力学
作者
Mitali Madhusmita Prusty,J. Arout Chelvane,A.V. Morozkin,K. Gururaj,K.G. Pradeep,P. L. Paulose,R. Nirmala
出处
期刊:AIP Advances
[American Institute of Physics]
日期:2022-03-01
卷期号:12 (3)
被引量:7
摘要
Laves phase rare earth intermetallic compound ErAl2 (Cubic, MgCu2-type) has been prepared by melt-spinning process. Analysis of powder X-ray diffraction data of melt-spun ErAl2 yields crystallite size of about 54 nm. Transmission electron microscopy image reveals particles of size ∼70 nm. The melt-spun ErAl2 orders ferromagnetically ∼10 K (TC) whereas the ferromagnetic ordering temperature is ∼14 K for the arc-melted ErAl2 compound. From the magnetization vs field data, isothermal magnetic entropy change (ΔSm) has been computed as a function of temperature near TC. The maximum ΔSm value in the melt-spun ErAl2 is ∼ −34 Jkg−1K−1 at 14 K for 70 kOe field change whereas the corresponding value in the arc-melted sample is ∼ −42 Jkg−1K−1 at 16 K. Thus, rapid solidification results in crystalline, coarse grained ErAl2 with submicron sized particles leading to only minor changes in the magnetic and magnetocaloric properties.
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