Influence of nanostructure (layers and particles) on the magnetism of rare-earth materials
Influence of nanostructure (layers and particles) on the magnetism of rare-earth materials
复制标题
DOI：
10.1063/1.370356
复制
发表时间：
1999-04-15
影响因子：
3.2
通讯作者：
Perera, P
中科院分区：
文献类型：
--
作者：
O'Shea, MJ;Perera, P
将元素稀土R（Gd，Dy，Tb）制备成层和颗粒形式，以观察几何形状（层或颗粒）和尺寸（层厚度或颗粒直径）对其磁性的影响。所有的稀土系统显示出最大的结晶度（在4.5 K下测量）在约10 nm（平均粒径或层厚度）。磁有序温度显着降低相比，散装时，尺寸减小到10 nm以下的层和颗粒的几何形状。几何形状对最大介电常数有显著影响，颗粒倾向于具有比层更大的介电常数。(C)1999年美国物理学会。[S0021-8979（99）50808-6]。
Elemental rare-earths R (Gd, Dy, Tb) are prepared in layer and particle form to look at the effects of geometry (layers or particles) and size (layer thickness or particle diameter) on their magnetism. All of the rare-earth systems show a maximum in coercivity (measured at 4.5 K) at about 10 nm (average particle diameter or layer thickness). Magnetic ordering temperature is reduced significantly compared to the bulk when size is reduced below 10 nm for both the layer and the particle geometry. Geometry has a significant effect on the maximum coercivity with particles tending to have larger coercivity than layers. (C) 1999 American Institute of Physics. [S0021-8979(99)50808-6].