Low-temperature anomalies in the dissipation of small mechanical resonators
AT&T Bell Laboratories - 600 Mountain Avenue, Murray Hill, NJ
Accepted: 15 February 1996
At very low temperatures the dissipation of a mechanical resonator is normally expected to be featureless and to vary slowly with temperature. Here we report measurements made at low-mK temperatures using a simple single-crystal silicon beam with a smallest dimension of 2.5 . Contrary to results obtained on larger resonators these data show a series of dissipation peaks which grow in magnitude with decreasing temperature. One sample exhibited five distinct peaks with equal spacings of 7.7 mK.
PACS: 62.40.+i – Anelasticity, internal friction, stress relaxation, and mechanical resonances / 62.65.+k – Acoustical properties of solids / 72.55.+s – Magnetoacoustic effects
© EDP Sciences, 1996