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Acoustically driven ferroelastic domain switching observed by time-resolved x-ray diffraction

Författare:
Publiceringsår: 2010
Språk: Engelska
Publikation/Tidskrift/Serie: Physical Review B
Volym: 81
Nummer: 2
Dokumenttyp: Artikel
Förlag: Amer Physical Soc

Sammanfattning

Domain polarization switching in potassium dihydrogen phosphate (KH2PO4, KDP) induced by a propagating strain wave has been observed with time-resolved x-ray diffraction. A pulsed electric field with amplitude of 6 kV/cm and duration of 1 mu s was applied along the crystallographic c axis. The field-induced strain waves emanating from the sample surfaces are the result of the converse piezoelectric effect. In the center of the probed surface two waves interfered constructively inducing ferroelastic domain switching, in the absence of an external electric field, at a delay of 3 mu s, corresponding to acoustic propagation at a velocity found to be 1500 m/s.

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

Published
Yes
  • ISSN: 1098-0121

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