Magnetic force microscopy using tip magnetization modulated by ferromagnetic resonance

Nanotechnology
Eiji ArimaYasuhiro Sugawara

Abstract

In magnetic force microscopy (MFM), the tip-sample distance should be reduced to analyze the microscopic magnetic domain structure with high spatial resolution. However, achieving a small tip-sample distance has been difficult because of superimposition of interaction forces such as van der Waals and electrostatic forces induced by the sample surface. In this study, we propose a new method of MFM using ferromagnetic resonance (FMR) to extract only the magnetic field near the sample surface. In this method, the magnetization of a magnetic cantilever is modulated by FMR to separate the magnetic field and topographic structure. We demonstrate the modulation of the magnetization of the cantilever and the identification of the polarities of a perpendicular magnetic medium.

References

Mar 30, 2007·Nature·Uwe KaiserRoland Wiesendanger
Jul 21, 2011·Physical Review Letters·R SchmidtR Wiesendanger
Jul 16, 2013·Physical Review Letters·Florian Pielmeier, Franz J Giessibl
Sep 26, 2013·Nature Communications·Sarah FahrendorfClaus M Schneider

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