High Temperature Resonant Ultrasound Spectroscopy: A Review

Table 3

Measured (𝑓^{𝑚𝑒𝑎𝑠}) and calculated (𝑓^{𝑐𝑎𝑙𝑐}) resonance frequencies after several iterations in a RUS calculation for an 𝑛-type silicon-germanium sample near 500°C. The first mode was not included (given a weight of 0) in the final fit.

Mode	𝑓^meas(MHz)	𝑓^calc(MHz)	Difference (%)
1	0.395133	0.393603	0.389
2	0.540797	0.541167	−0.068
3	0.638239	0.638511	−0.043
4	0.642020	0.642575	−0.086
5	0.651254	0.651505	−0.039
6	0.709419	0.709383	0.005
7	0.734763	0.735937	−0.160
8	0.739370	0.739131	0.032
9	0.751041	0.749752	0.172
10	0.758227	0.758263	−0.005
11	0.808084	0.807730	0.044
12	0.835150	0.836441	−0.154
13	0.860419	0.861814	−0.162
14	0.880744	0.882067	−0.150
15	1.020977	1.020704	0.027
16	1.030651	1.031488	−0.081
17	1.033333	1.034599	−0.122
18	1.070578	1.071760	−0.110
19	1.079524	1.077915	0.149
20	1.094728	1.093729	0.091