Session S44: Magnetic and Force Microscopy
2:30 PM–5:18 PM, Wednesday, March 23, 2005
LACC Room: 518
Sponsoring Unit:
GIMS
Chair: Mark Hersam, Northwestern University
Abstract ID: BAPS.2005.MAR.S44.3
Abstract: S44.00003 : MRFM and non-contact friction experiments under UHV conditons
2:54 PM–3:06 PM
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Abstract 
Authors:
S. Rast
U. Gysin
P. Ruff
C. Wehrle
H.-R. Hidber
E. Meyer
(University of Basel)
P. Vettiger
M. Despont
C. Gerber
(IBM Research Division Zurich)
D.W. Lee
(Chonnam National University)
In this contribuiton we present magnetic resonance force microscopy (MRFM ) experiments and non-contact friction force experiments made on $\gamma $-irradiated quarz samples under UHV condtions and low temperatures. Ultrasensitve cantilevers with integrated magnetic tips allow us to detect forces in the order of 10$^{-18 }$N/$\surd $Hz [1]. The measurements showed that the sensitivity did not change significantly in a homogenous magnetic field. In quarz samples long-range, non contact friction forces are observerd. A spin-lifetime of 137 ms was measured by cyclic inversion of the spins. The measurement was achieved with an ultrasensitve PLL using the OSCAR protocol. [1] Gysin et al., Phys. Rev. B \textbf{69}, 045403 (2004)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.MAR.S44.3