Table 3: Electrical parameters of the equivalent circuit deduced from complex impedance spectrum for different temperatures.
|
T(K) |
Rg(W-1) |
Cg(F)*10-10 |
Rgb(W-1) |
Cgb(F)*10-10 |
|
295 |
954280 |
2.908 |
5.4109*106 |
3.964 |
|
320 |
847790 |
2.752 |
3.006*106 |
6.082 |
|
340 |
683210 |
2.295 |
802030 |
0.1081 |
|
360 |
475520 |
0.1105 |
529100 |
1.024 |
|
380 |
300100 |
5.082 |
325330 |
2.378 |
|
400 |
99980 |
5.299 |
200700 |
2.440 |
|
420 |
87714 |
8.036 |
114950 |
2.228 |
T: Temperature; Rg: Grain resistance; Rgb: Grain-boundary resistance; Cgb: Grain-boundary capacitance.