Application of single crystalline PMN-PT and PIN-PMN-PT in high-performance pyroelectric detectors

In this work the applicability of single crystalline PIN-PMN-PT in pyroelectric detectors was evaluated and compared with high-quality Mn-doped PMN-28PT and standard LTO. Pyroelectric and dielectric measurements confirmed an increased processing and operating temperature range due to higher phase transitions of PIN-PMN-PT. Pyroelectric coefficient of 705-770 μC/m²K was obtained with PIN-PMN-PT, which is about 70 to 80 % of the pyroelectric coefficient of PMN-PT but four times higher than LTO. Manganese doping has been proved as a solution to decrease the dielectric loss of PMN-PT and it also works well for PIN-PMN-PT. An outstanding specific detectivity D* of about 1·10⁹ cmHz^1/2/W was achieved at a frequency of 3 Hz for Mn-doped PMN-based detectors.