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Physical Review Letters
Paper

Polarization echoes and long-time storage in piezoelectric powders

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Abstract

Two- and three-pulse polarization echoes are detected in powders of mechanically resonant particles of piezoelectric materials. Under some conditions the decay time of the three-pulse echo can be of order one day or longer. A model for the echo formation and long decay time based upon the torque exerted on an oscillating dipole by an applied rf field is described. © 1976 The American Physical Society.

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Physical Review Letters

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