Dissipation in Nanocrystalline-Diamond Nanomechanical Resonators

Details Dissipation in Nanocrystalline-Diamond Nanomechanical Resonators Dissipation in Nanocrystalline-Diamond Nanomechanical Resonators

2003-11-24

arxiv.org/abs/cond-mat/0311554v1

Physics

Condensed Matter

13 pages, 3 figures, to be published in Applied Physics Letters

Scientific paper

10.1063/1.1646213

We have measured the dissipation and frequency of nanocrystalline-diamond nanomechanical resonators with resonant frequencies between 13.7 MHz and 157.3 MHz, over a temperature range of 1.4-274 K. Using both magnetomotive network analysis and a novel time-domain ring-down technique, we have found the dissipation in this material to have a temperature dependence roughly following T^0.2, with Q^-1 = 10^-4 at low temperatures. The frequency dependence of a large dissipation feature at ~35-55 K is consistent with thermal activation over a 0.02 eV barrier with an attempt frequency of 10 GHz.

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