Second-Order Ferroic Properties of a Pb₅Ge₃O₁₁ Uniaxial
Ferroelectric

E. F. Dudnik, V. M. Duda, and A. I. Kushnerov

Dnepropetrovsk National University, Dnepropetrovsk, 49050 Ukraine

e-mail: elf@ff.dsu.dp.ua

Received April 11, 2001

Abstract—The ferrobielastic properties (ferroic properties of the second order) earlier theoretically predicted
for lead germanate uniaxial ferroelectric crystals are justified experimentally. It is demonstrated that single-
domain samples are formed upon cooling to temperatures below the Curie point under uniaxial mechanical
stresses corresponding to a combination of mechanical stresses ₁₁₁₃ or ₂₂₂₃. The macroscopic mechanism
of this phenomenon is considered. © 2001 MAIK “Nauka/Interperiodica”.

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