Nanocrystalline Y0.5Sm0.5Co5 ribbons obtained by melt spinning
Nanocrystalline Y0.5Sm0.5Co5 ribbons obtained by melt spinning
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DOI：
10.1063/1.3076139
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发表时间：
2009-03
影响因子：
3.2
通讯作者：
J. L. Hidalgo-González;F. J. R. Gómez;J. Matutes-Aquino
中科院分区：
文献类型：
--
作者：
J. L. Hidalgo-González;F. J. R. Gómez;J. Matutes-Aquino
在铜轮表面速度为40m/S的条件下，采用熔体旋压法制备了Y0.5Sm0.5Co5纳米晶薄带，用X射线衍射仪对铸态合金和快凝薄带的X射线衍射谱进行了表征，结果表明Y0.5Sm0.5Co5薄带为类CaCu5六方结构。观察了非接触薄带表面的结晶织构，并观察到枝晶尺寸在1~5μm之间的枝晶组织。此外，在接触表面还观察到了细小的显微组织。经过退磁校正后的磁测量结果显示出一条非饱和磁化曲线。观察到了典型的成核型磁化机制的初始磁化曲线，测得其本征矫直力为1.2T，MR/MS比为0.67。
Nanocrystalline Y0.5Sm0.5Co5 ribbons were obtained by melt spinning using a copper wheel surface speed of 40 m/s. X-ray diffraction patterns from the as-cast ground alloy and from the melt-spun ribbons were indexed as CaCu5-like hexagonal structure. Crystallographic texture was observed and a dendritic microstructure with a dendrite size between 1 and 5 μm from the noncontacting ribbon surface was measured. In addition, a finer microstructure on the contacting surface was observed. Magnetic measurements, corrected for the demagnetizing field, show a nonsaturated magnetization curve. An initial magnetization curve typical of a nucleation-type magnetization mechanism was observed and an intrinsic coercivity of 1.2 T and a Mr/Ms ratio equal to 0.67 were measured.