Enhancement of pyroelectricity in Mn-doped (011) 71Pb(Mg1/3Nb2/3)O3-6PbZrO3-23PbTiO3 single crystals

Single crystals of 71PMN-6PZ-23PT [71Pb(Mg1/3Nb2/3)O-3-6PbZrO(3)-23PbTiO(3)] oriented along the thickness direction (011) with and without Mn doping were grown by a solid-state single-crystal growth method, and pyroelectric properties of the crystals were investigated. Though the pyroelectric coefficient of a Mn doped crystal is not significantly higher than the un-doped one at room temperature (RT), a large enhancement was observed after 0.7 mol. % Mn doping at high temperatures (> 100 & DEG;C). Furthermore, the FoMs for practical applications at RT, the Mn doped crystal showed large enhancement as compared to the un-doped one. The presented single crystals also yielded excellent figure of merit (FoM) values for pyroelectricity: F-i, F-v, and F-D were 3.5 x 10(-10) m V-1, 0.02 m(2) C-1, and 2.68 x 10(-5) Pa-1/2, respectively, at RT. The large pyroelectric response in the Mn-doped single crystal is attributed to the large ferroelectric polarization and low dielectric constant and dielectric loss. The demonstrated pyroelectric response in the Mn-doped 71PMN-6PZ-23PT single crystal shows that it exhibits excellent potential for various thermal sensor applications.& nbsp;Published under an exclusive license by AIP Publishing.

Automated summary

Single crystals of 71PMN-6PZ-23PT oriented along the thickness direction with and without Mn doping were grown, and their pyroelectric properties were investigated. The Mn-doped crystal showed significant enhancement at high temperatures, and also had potential for thermal sensor applications at room temperature.