Self-organized growth of nanosized vertical magnetic Co pillars on Au(111)

被引：118

作者：

Fruchart, O ^{[1
]}

Klaua, M ^{[1
]}

Barthel, J ^{[1
]}

Kirschner, J ^{[1
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.83.2769

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Starting from the conventional self-organized arrays of flat Co dots on Au(111), we extended the growth vertically to fabricate Co pillars. The principle is to deposit sequentially a fraction x of an atomic layer (AL) of Co and 1 - x AL of Au. At each step, the deposited Co atoms aggregate on top of the previous dots, increasing their height by 1 AL. Pillars with a 2:1 vertical aspect ratio were achieved. Because of the large number of atoms per pillar, the superparamagnetic blocking temperature is 300 K in the pillars, whereas it is only 20 K in conventional flat dots with the same lateral density.

引用

页码：2769 / 2772

页数：4

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