Pyroelectricity in Non-Central Crystals |
| L.P. Pereverzeva, Yu.M. Poplavko, Yu.V. Prokopenko Kiev Polytechnic Institute, 37 Peremogi av., 252056 Kiev, Ukraine and A.G. Chepiliko Institute of Physics, AS Ukraine, 46 Nauki av., 252028 Kiev, Ukraine |
| Received: October 5, 1992; revised version: April 14, 1993 |
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| Unit cell electric arrangement of piezoelectric crystals may be described by various multipole/octupole/dipole electric moments which corresponds to a three/two/one-dimensional intrinsic polarity respectively. Such a latent polar structure is totally self-compensated in piezoelectrics if they are mechanically free, but it is non-compensated in pyroelectrics and ferroelectrics. Uniform but anisotropic partial clamping destroys a total self-compensation of non-central crystal intrinsic polarity. This decompensation allows to observe a polar response that is a "dipole projection" ΔPi from, broken by clamping, spatial polar arrangement of piezoelectrics. |
| DOI: 10.12693/APhysPolA.84.287 PACS numbers: 77.70.+a, 77.80.Bh |