Tunable magnetic domain wall oscillator at an anisotropy boundary

被引：18

作者：

Franken, J. H. ^{[1
]}

Lavrijsen, R. ^{[1
]}

Kohlhepp, J. T. ^{[1
]}

Swagten, H. J. M. ^{[1
]}

Koopmans, B. ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Appl Phys, Ctr NanoMat cNM, NL-5600 MB Eindhoven, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 10期

关键词：

DRIVEN; MULTILAYERS; MOTION;

D O I：

10.1063/1.3562299

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a magnetic domain wall (DW) oscillator scheme, in which a low dc current excites gigahertz angular precession of a DW at a fixed position. The scheme consists of a DW pinned at a magnetic anisotropy step in a perpendicularly magnetized nanostrip. The frequency is tuned by the current flowing through the strip. A perpendicular external field tunes the critical current density needed for precession, providing great experimental flexibility. We investigate this system using a simple one-dimensional model and full micromagnetic calculations. This oscillating nanomagnet is relatively easy to fabricate and could find application in future nanoscale microwave sources. (C) 2011 American Institute of Physics. [doi:10.1063/1.3562299]

引用

页数：3

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