Fig. 3

a–f show temperature-dependent dielectric constant (a, c, e) and tangent loss (b, d, f) for 5, 10, and 50 kHz probe frequency, respectively. The dielectric data in cooling mode are taken on the same sample after 1 year and compared with our previous heating data. It matches well except more diffused peak in cooling mode; however, almost similar features are seen in tangent loss data