Dielectric Properties of Rhombohedral PbNb₂O₆

Table 1

Values, for paraelectric PbNb₂O₆ (rhombohedral PbNb₂O₆), of 𝜀^′ and tan𝛿 at room temperature and values of 𝜀^′_peak1, 𝜀^′_peak2, and 𝜀^′_peak3 with the corresponding temperatures 𝑇_peak1, 𝑇_peak2, and 𝑇_peak3, as read from the experimental data during heating.

Frequency (Hz)	𝜀^′; (room temperature)	tan𝛿; (room temperature)	𝜀^′peak1	𝑇peak1 (°C)	𝜀^′peak2	𝑇peak2 (°C)	𝜀^′peak3	𝑇peak3 (°C)
1 k	64.3	0.044	253.4	471.1±3	495.8	584.4±2	711.4	684.4±2
5 k	64.0	0.013	204.0	479.5±4	281.0	571.3±3
10 k	63.9	0.005	186.5	487.6±5	238.8	574.9±3
30 k	63.8	0.003	165.6	497.6±5	195.9	574.9±3
50 k	63.8	0.006	160.9	509.2±6	182.0	573.3±4
500 k	64.1	0.051			131.3	572.8±4
1 M	64.9	0.106			117.8	575.5±4
2 M	65.1	−0.004			115.9	577.0±5
3 M	68.0	−0.004			115.2	577.0±5
4 M	71.7	0.002			118.7	575.9±5
5 M	75.3	−0.005			124.4	574.5±5
5.5 M	77.6	−0.026			128.5	575.5±5