Capping-layer-induced magnetic coupling in a two-dimensional nanostructured system
Capping-layer-induced magnetic coupling in a two-dimensional nanostructured system
复制标题
二维纳米结构系统中的覆盖层感应磁耦合
DOI：
10.1063/1.1689739
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发表时间：
2004
影响因子：
4
通讯作者：
A. Cebollada
中科院分区：
文献类型：
--
作者：
E. Navarro;Y. Huttel;C. Clavero;G. Armelles;A. Cebollada
Pt覆盖层的磁极化导致二维Fe岛阵列中的磁耦合增加。对于小的超顺磁性岛，Pt沉积导致超顺磁性-铁磁性转变。对于较大的铁磁但弱耦合的岛，Pt沉积产生更强的铁磁耦合。极性克尔光谱测量和模拟证明了与Fe接触的Pt的磁极化。所描述的效果和它们的解释是支持使用的nonpolarizable铝盖帽，其中超顺磁性到铁磁的过渡和增加的铁磁耦合是缺席。
The magnetic polarization of a Pt capping layer leads to an increase of the interisland magnetic coupling in a two-dimensional array of Fe islands. For small superparamagnetic islands, Pt deposition leads to a superparamagnetic–ferromagnetic transition. For larger ferromagnetic but weakly coupled islands, Pt deposition produces a stronger interisland coupling. Polar Kerr spectroscopy measurements and simulations evidence the magnetic polarization of Pt in contact with Fe. The described effects and their interpretation are supported by the use of a nonpolarizable Al capping, where both the superparamagnetic-to-ferromagnetic transition and the increase of the interisland coupling are absent.