Surface ferromagnetism of Pd fine particles.
Surface ferromagnetism of Pd fine particles.
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DOI：
10.1103/physrevlett.91.197201
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发表时间：
2003-11
影响因子：
8.6
通讯作者：
T. Shinohara;T. Satō;T. Taniyama
中科院分区：
文献类型：
--
作者：
T. Shinohara;T. Satō;T. Taniyama
我们报告清楚的证据的铁磁性的气体蒸发的钯微粒具有干净的表面。清洁的Pd颗粒被发现具有磁性异质结构：颗粒的表面是铁磁性的，其余部分是顺磁性的。磁饱和分量的尺寸依赖性揭示了铁磁有序仅发生在颗粒的（100）面上，并且从表面开始的最上面的2至5层贡献于具有（0.75+/-0.31）微（B）/原子的磁矩的铁磁性。
We report clear evidence of the ferromagnetism of gas-evaporated Pd fine particles with a clean surface. The clean Pd particle is found to have a magnetic heterostructure: the surface of the particle is ferromagnetic and the rest is paramagnetic. The size dependence of the magnetic saturation component reveals that the ferromagnetic ordering occurs only on (100) facets of the particle and that the topmost two to five layers from the surface contribute to the ferromagnetism with a magnetic moment of (0.75+/-0.31)micro(B)/atom.