Piezoelectric coefficients of PMN-0.29PT single crystals in the temperature range of phase transitions

Abstract

The temperature dependencies of piezoelectric coefficients d 33 and d 31 for Pb(Mg 1/3 Nb 2/3 )O 3 -0.29PbTiO 3 multi-domain single crystals, poled in [001]-direction, were investigated. The two samples had x-and y-axes identical with crystallographic [100] and [010] directions respectively, and the second two samples with [−110] and [110]directions. The laser interferometry method was used for the piezoelectrically induced displacement measurement. Piezoelectric coefficients were similar for all samples at room temperature and were roughly d 31 =−550 pC/N and d 33 =1,100 pC/N. Very high increase of coefficients to values about d 31 =−2,100 pC/N and d 33 =3,900 pC/N was observed below temperature of the first phase transition 101°C. The coefficients exhibited only negligible frequency dependence at room temperature. But coefficient increases of about 10-30% as were observed at temperatures about 98°C for 1 Hz applied field frequency in comparison to values received at 1 kHz. The second phase transition to cubic phase was observed at the temperature 124°C. The temperature dependencies of dielectric and piezoelectric coefficients were compared too.

Design, Analysis, and Characterization of Single Crystal Energy Harvesters for Rotorcraft Wireless Sensor Applications

“…Sulc and colleagues (Ref. 13) report that k 31 remains constant until the phase transition temperature, and then decreases 35%. Upon cooling, k 31 does not return to its original value until cooled to room temperature.…”

“…As temperature increases, the magnitude of d 31 (charge coefficient) increases (Ref. 13). However, it is shown that the electromechanical coupling factor, k 31 , for PMN-PT material remains stable with temperature before its phase transition (Ref.…”

Temperature Dependence of Electrical Properties and Phase Transition Characteristics of [001]‐Oriented Rhombohedral Mn‐0.15PIN‐0.55PMN‐0.30PT Single Crystal

“…The value of d 33 * increased apparently with the rising of temperature and reached the maximum at 110 °C (around FE R ‐FE M phase transition), and then decreased drastically with the further increase in temperature and nearly disappeared above the T m . The considerable improvement of piezoelectric properties around the ferroelectric phase transition temperature was also observed in PMN‐PT and PZN‐PT single crystals, which can be attributed to the phase instability induced by ferroelectric phase transition, the easy mobility of domain walls, the discontinuity in polarization across phase boundaries, etc . In order to deeply understand the relationships between structure and properties, it is necessary to further study the phase transition characteristics of Mn‐0.15PIN‐0.55PMN‐0.30PT crystal.…”

“…The considerable improvement of piezoelectric properties around the ferroelectric phase transition temperature was also observed in PMN-PT and PZN-PT single crystals, which can be attributed to the phase instability induced by ferroelectric phase transition, the easy mobility of domain walls, the discontinuity in polarization across phase boundaries, etc. [24] In order to deeply understand the relationships between structure and properties, it is necessary to further study the phase transition characteristics of Mn-0.15PIN-0.55PMN-0.30PT crystal. Raman spectroscopy is proved to be an effective tool to study the local structure and phase transitions of the relaxor-PT crystals.…”