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A geometry for optimizing nanoscale magnetic resonance force microscopy

By Fei Xue, P. Peddibhotla, M. Montinaro, D. Weber and M. Poggio

Abstract

We implement magnetic resonance force microscopy (MRFM) in an experimental geometry, where the long axis of the cantilever is normal to both the external magnetic field and the RF microwire source. Measurements are made of the statistical polarization of $^1$H in polystyrene with negligible magnetic dissipation, gradients greater than $10^5$ T/m within 100 nm of the magnetic tip, and rotating RF magnetic fields over 12 mT at 115 MHz. This geometry could facilitate the application of nanometer-scale MRFM to nuclear species with low gyro-magnetic ratios and samples with broadened resonances, such as In spins in quantum dots.Comment: 4 pages, 5 figure

Topics: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Other Condensed Matter
Year: 2011
DOI identifier: 10.1063/1.3579521
OAI identifier: oai:arXiv.org:1103.4241
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