Preparation, microstructure, and magnetic properties of bulk nanocrystalline Gd metal
Preparation, microstructure, and magnetic properties of bulk nanocrystalline Gd metal
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DOI：
10.1063/1.2400079
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发表时间：
2006-12
影响因子：
4
通讯作者：
M. Yue;J. Zhang;H. Zeng;K. Wang
中科院分区：
文献类型：
--
作者：
M. Yue;J. Zhang;H. Zeng;K. Wang
采用放电等离子烧结（SPS）及后续退火工艺制备了块体纳米金属钆。SPS Gd金属具有平均晶粒尺寸约为10nm的单相。在SPS Gd样品中发现了压力诱导的C轴晶体织构。随着Gd晶粒尺寸从微米级减小到纳米级，居里温度TC降低了10.7K，5K时Gd原子的磁矩从7.81μB显著降低到6.31μB。这些结果表明，由于有限尺寸效应，纳米结构对Gd的磁性的显着影响。
Bulk nanocrystalline gadolinium metal was prepared using spark plasma sintering (SPS) and subsequent annealing process. The SPS Gd metal had a single phase with a mean grain size of about 10nm. A pressure-induced C-axis crystal texture was found in the SPS Gd sample. With the decrease of Gd grains from micrometer to nanometer range, the Curie temperature TC decreased by 10.7K and the magnetic moment per Gd atom at 5K dropped noticeably from 7.81μB to 6.31μB. These results indicate the remarkable influence of the nanostructure on the magnetism of Gd due to the finite size effect.