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Dielectric investigations of the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3crystal were performed in the frequency domain at 10^(-4) 10^5 Hz. In theergodic relaxor phase two overlapping relaxation processes obeying theKohlrausch-Williams-Watts law, exp[-(t/tau)^beta], and the Curievon Schweidlerlaw, t^(-n), respectively, were found and parameterized. The values of beta, nand 1/tau tend to zero at 211 K following the Vogel-Fulcher law, pointing tothe glassy freezing of the dipole dynamics related to both relaxationprocesses.Comment: PDF file, 7 pages, 4 figures collected on pp. 4-

physical review. b, condensed matter and materials physics

Double freezing of dielectric response in relaxor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Pb</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi mathvariant="normal">Mg</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>∕</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">Nb</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>∕</mml:mo><mml:mn>3</mml:mn></mml:mrow></mml:msub><mml:mo>)</mml:mo></mml:…

Double freezing of dielectric response in relaxorPb(Mg1∕3Nb2∕3)