Self-assembled magnetic nitride dots on Cu(100) surfaces
Self-assembled magnetic nitride dots on Cu(100) surfaces
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Cu(100) 表面上的自组装磁性氮化物点
DOI：
10.1103/physrevb.69.121404
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发表时间：
2004
影响因子：
3.7
通讯作者：
D. Boerma
中科院分区：
文献类型：
--
作者：
J. Gallego;S. Grachev;M. Passeggi;F. Sacharowitz;D. Écija;R. Miranda;D. Boerma
这里我们描述了一种在清洁的铜(100)表面上直接制备自组织有序的Fe4N磁点图案的过程。它是基于Fe在等离子体源产生的N原子助熔剂中蒸发到保持在700K的Cu(100)表面上的。岛的平均横向尺寸为10 nm，它们穿透三到四层到衬底。在相同条件下生长的25 nm厚的非结构薄膜上，氮化铁点呈现出典型的p4g(2X2)表面重构，X射线衍射、转换电子穆斯堡尔谱、卢瑟福背散射谱和磁光克尔效应证实了在铜(100)衬底上存在纯磁性、立方、伽马‘-Fe4N(100)层的外延。
We describe here a procedure for the direct fabrication of a self-organized, ordered pattern of Fe4N magnetic dots on an otherwise clean Cu(100) surface. It is based on the evaporation of Fe in a flux of atomic N produced by a plasma source onto a Cu(100) surface kept at 700 K. The large-scale morphology of the surface is demonstrated by scanning tunneling microscope. The average lateral size of the islands is 10 nm and they penetrate three to four layers into the substrate. The iron nitride dots present a characteristic p4g(2 X 2) surface reconstruction, detected also on 25 nm thick, nonstructured films grown in the same conditions, on which x-ray diffraction, conversion electron Mossbauer spectroscopy, Rutherford backscattering spectroscopy, and magneto-optic Kerr effect confirm the existence of a pure magnetic, cubic, gamma'-Fe4N(100) layer epitaxial with the Cu(100) substrate.