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New arcticle clarifies the interpretation of dissipation measurements in FM-AFM

posted Sep 17, 2011, 10:08 AM by Antoni Tekiel   [ updated Sep 19, 2011, 5:37 AM by SPM Evaporator ]
"Our theory predicts large quantitative and qualitative variability observed in dissipation spectroscopy experiments, contrast inversion at step edges and in atomic-scale dissipation imaging, as well as changes in the power-law relationship between the drive signal and bias voltage in dissipation spectroscopy. The magnitude of apparent damping can escalate by more than an order of magnitude at cryogenic temperatures. We present a simple nondestructive method for correcting this source of apparent damping, which will allow dissipation measurements to be reliably and quantitatively compared to theoretical models."

A. Labuda, Y. Miyahara, L. Cockins and P. H. Grütter
"Decoupling conservative and dissipative forces in frequency modulation atomic force microscopy"
Phys. Rev. B 84, 125433 (2011)