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Nanometer-scale magnetic resonance imaging

Rev. Sci. Instrum. 75, 1175 (2004); doi:10.1063/1.1666983

Published 5 April 2004

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Shih-hui Chao, William M. Dougherty, and Joseph L. Garbini
Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195-2600

John A. Sidles
Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington 98195-6500
Magnetic resonance force microscopy (MRFM) images the three-dimensional spatial distribution of resonant spins by mechanical force detection. Image reconstruction in MRFM is challenging because the resonance occurs in a strongly curved shell that extends beyond the scan range. In contrast with conventional magnetic resonance imaging, where Fourier techniques work well, the curved-shell resonant geometry inherent to MRFM requires novel reconstruction methods. Here, we show the application of iterative reconstruction in an electron spin resonance imaging experiment with 80 nm voxels. The reconstructed image has a total scan volume of 0.5 cubic micrometers, and was generated by a magnetic resonant shell with a curvature radius of 2.3 µm. The imaged object was a paramagnetically doped solid with an obliquely tilted surface. The reconstructed image correctly identified the location and orientation of the surface, and mapped the spin distribution within the solid. Applications of MRFM include three-dimensional nanometer-scale mapping of dopant distributions in semiconductors, studies of magnetism of thin films, and spin diffusion physics. An ultimate goal of MRFM is the direct observation of molecular structure at the atomic scale. ©2004 American Institute of Physics.
History: Received 8 September 2003; accepted 5 January 2004; published 5 April 2004
Permalink: http://link.aip.org/link/?RSINAK/75/1175/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.57.Pt
    Submillimeter wave, microwave and radiowave spectrometers including magnetic resonance spectrometers, auxiliary equipment, and techniques
  • 07.79.Pk
    Magnetic force microscopes
  • 68.37.Rt
    Magnetic force microscopy (MFM) of surfaces, interfaces and thin films
  • 07.05.Pj
    Image processing in experimental physics
  • YEAR: 2004

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PUBLICATION DATA

ISSN:
0034-6748 (print)   1089-7623 (online)
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REFERENCES (23)
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