N M Olekhnovich et al 2005 J. Phys. D: Appl. Phys. 38 1253 doi:10.1088/0022-3727/38/8/024
N M Olekhnovich1, Yu V Radyush2, N P Vyshatko1,2, A N Salak1,2,3 and V M Ferreira2
Show affiliationsDielectric properties of perovskite solid solutions in the (1 − x)PbMg1/3Nb2/3O3–xPbAl1/2Nb1/2O3 system synthesized under high pressure and high temperature were studied. It has been found that the dielectric response of the high-pressure ceramics with x < 0.2 changes from two-phase behaviour to a solely relaxor one when annealing at elevated temperatures. The dielectric response of the ceramics and its evolution are considered in terms of an ordering action of the high-pressure synthesis and the opposite effect of the annealing process. The peculiarities of dielectric characteristics indicate the morphotropic phase boundary in the system at about x = 0.2. The local symmetry of the polar regions at the ranges above and below the boundary is discussed.
62.50.-p High-pressure effects in solids and liquids
Issue 8 (21 April 2005)
Received 21 November 2004, in final form 7 February 2005
Published 1 April 2005
N M Olekhnovich et al 2005 J. Phys. D: Appl. Phys. 38 1253
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