Dissipation in nanocrystalline-diamond nanomechanical resonators

Hutchinson, A.B.; Truitt, P.A.; Schwab, K.C.; Sekaric, L.; Parpia, J.M.; Craighead, H.G.; Butler, J.E.
February 2004
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p972
Academic Journal
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 time-domain ring-down technique, we have found the dissipation in this material to have a temperature dependence roughly following T[sup 0.2], with Q[sup -1]≈10[sup -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. © 2004 American Institute of Physics.


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