Shape-dependent thermal switching behavior of superparamagnetic nanoislands

被引：82

作者：

Bode, M

Pietzsch, O

Kubetzka, A

Wiesendanger, R

机构：

[1] Univ Hamburg, Inst Appl Phys, D-20355 Hamburg, Germany

[2] Univ Hamburg, Microstruct Res Ctr, D-20355 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.92.067201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermal switching behavior of individual perpendicularly magnetized nanoscale Fe islands consisting of 200-600 atoms only is studied by low-temperature spin-polarized scanning tunneling microscopy. Our results reveal that the switching rate is strongly affected by the particle shape; i.e., elongated islands switch much more rapidly than compact islands of the same volume. This observation is explained by different processes of magnetization reversal. Our results suggest that compact magnetic particles are an ideal choice for future perpendicular magnetic recording media because they are robust against thermal magnetization reversal.

引用

页数：4

共 20 条

[1] Magnetization-direction-dependent local electronic structure probed by scanning tunneling spectroscopy -: art. no. 237205 [J].