The magnetic and structural properties of the high-coercivity Nd₅₀Fe₄₀Al₁₀ amorphous alloys

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• 作者：Chiriac ; Horia ; Lupu ; N.
• 关键词：B180 ; G183 ; F117 ; M100 ; C200 ; 75.50.Kj
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2001
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：July, 2001
• 卷：287
• 期：1-3
• 页码：135-139
• 文件大小：285 K

摘要

Melt-spun amorphous ribbons with thicknesses between 25 and 150 μm and amorphous rods with diameters between 0.5 and 2 mm, prepared by copper mould suction casting, having nominal composition Nd₅₀Fe₄₀Al₁₀, were measured. The magnetic properties were measured as a function of temperature from 5 to 800 K. The dependence of the coercive field on the thickness of the samples and temperature is ascribed to two magnetic phases: Fe–Nd ferromagnetic clusters and a Nd-based matrix. The differences observed between zero-field-cooled (M_ZFC) and field-cooled (M_FC) magnetisations as well as the presence of a cusp on the M_ZFC curve, and its displacement as a function of the magnitude of the external field are consistent with two types of magnetic order: spin-glass-like short-range order and long-range ferromagnetic order.