Wu Y.H., Han G., Zheng Y.K.
National University of Singapore, SG
Keywords: MFM tips, point-dipole response, synthetic structure
Recently, we have developed a synthetic MFM tip consisting of two ferromagnetic layers and a non-magnetic spacer [1]. The two ferromagnetic layers are coupled antiferromagnetically so that the MFM works in a differential detection mode. This has led to the enhancement of high-frequency component against the lower frequency counterpart. Experimentally we have also found that the synthetic tip functions as a point-dipole tip. In this paper, we will present a detailed theoretical analysis of the tip and compare the results with experimental data. The effect of spacer thickness on the imaging characteristics of the MFM tip will also be discussed. [1] Y. H. Wu et al, Appl. Phys. Lett. 82, 1748-1750 (2003).
Journal: TechConnect Briefs
Volume: 2, Technical Proceedings of the 2005 NSTI Nanotechnology Conference and Trade Show, Volume 2
Published: May 8, 2005
Pages: 715 - 718
Industry sector: Advanced Materials & Manufacturing
Topic: Materials Characterization & Imaging
ISBN: 0-9767985-1-4