Research Article
Study of Dielectric Properties and Ultrasonic Attenuation in KDP-Type Ferroelectrics
Table 3
Calculated values of
, and
for KDP-type crystals.
| | Temperature (K) | Collective phonon mode frequency (cmā1) (present study) | Transverse dielectric constant (present study) | Observed dielectric constant (present study) | Loss tangent along the -axis (present study) | Loss tangent along the -axis (present study) |
| | 125 | 45.65 | 63 | 35741 | 0.004 | 0.067 | | 130 | 57.04 | 62 | 6144 | 0.00398 | 0.035 | | 135 | 58.69 | 61 | 2286 | 0.00397 | 0.0261 | | 140 | 63.04 | 60 | 874 | 0.00396 | 0.0255 | | 145 | 65.91 | 59 | 486 | 0.00365 | 0.0250 |
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