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VOLUME 61 (1995) | ISSUE 3 | PAGE 225
Anomalous generation and conversion of acoustic modes near phase transitions in ferroelectric single crystals
A nonlinear generation of sound (at half the frequency of the pulsed rf excitation and also at twice this frequency) has been observed in Rochelle salt and KDP single crystals near the ferroelectric phase transition. This generation occurs above a threshold. A manifestation of this anomalous generation and of a conversion of acoustic modes into polarization echo signals has been demonstrated. © 1995 American Institute of Physics.