Optimal control of force microscope cantilevers. II. Magnetic coupling implementation

We describe the implementation of optimal controllers for damping the motion of cantilevers used in magnetic resonance force microscopy. We demonstrate that optimal control is achievable and that torsional magnetic coupling provides an effective actuation method. Cantilever Brownian vibrational ampl...

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Veröffentlicht in:Journal of applied physics 1996-08, Vol.80 (4), p.1959-1964
Hauptverfasser: Bruland, K. J., Garbini, J. L., Dougherty, W. M., Sidles, J. A.
Format: Artikel
Sprache:eng
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Zusammenfassung:We describe the implementation of optimal controllers for damping the motion of cantilevers used in magnetic resonance force microscopy. We demonstrate that optimal control is achievable and that torsional magnetic coupling provides an effective actuation method. Cantilever Brownian vibrational amplitude was reduced from 2 to 0.16 Å and resonant quality was reduced from 2000 to 5. Applied control fields were sufficiently small that they would not affect magnetic resonance phenomena.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.363086