Table 4 Acoustic wave velocities (Longitudinal (Vl), transverse (Vs)), mean wave velocities (Vm) and Debye temperature (\(\:{\varvec{\theta\:}}_{\varvec{D}}\)).
Sample | \(\:{\varvec{V}}_{\varvec{l}}\times\:{10}^{3}\) | Vs\(\:\times\:{10}^{3}\) | Vm\(\:\times\:{10}^{3}\) | \(\:{\varvec{\theta\:}}_{\varvec{D}}\) |
|---|---|---|---|---|
(m/s) | (m/s) | (m/s) | K | |
MgFe2O4 | 6.86 | 3.96 | 4.4 | 698.99 |
MgFe2O4/10% rGO | 7.06 | 4.08 | 4.52 | 699.62 |
MgFe2O4/10%PPy | 7.12 | 4.11 | 4.56 | 698.54 |
MgFe2O4/10% rGO/10%PPy | 6.93 | 4 | 4.44 | 698.12 |
