Electric Polarization.
Description:
Electric polarization is measured by pyro-current technique.
The charge induced on the sample faces generates current Ip via a probe resistor. The current is recorded by a digitizer, and integrated numerically to obtain electric polarization P.
| FEATURES | DRESDEN |
|---|---|
| Local Contact | Yuri Skourski |
| Field range | 0 ... 85 T |
| Temperature range | 1.4... 270 K |
| Sample size | The sample should be shaped as a plane-parallel plate, with a surface area of few square millimeters, and thickness 0.1 – 1 mm. The polling voltage ranges +/- 500 V. Minimum sample size 1x1x1 mm³ The samples can be mounted with a defined orientation |
| Sensitivity | |
| Typical experiments | 
Magnetic-field variation of the pyrocurrent and the electric polarization for the two axes of the CuO single crystal. [1] |
| Sample Holder | |
| Sample environment | Gaseous helium from 270K down to 4K, liquid helium below |
| Measurement Examples | [1] Z. Wang et al., Nat. Comm. 7, 10295 (2016) |