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VOLUME 61 (1995) | ISSUE 2 | PAGE 117
Glassy relaxation in lead (magnesium niobate)-titanate crystals
The long-term polarization relaxation (r^ Ю4 s) in a 0.87PbMg1/3Nb2/3O3-0.13PbTiO3 crystal in the dipole-glas s phase has been studied. The results reveal the power-law relaxation predicted by the dynamic scaling, divergences of the static zero-field-cooled susceptibility at the transition to the mixed phase, and a difference between that susceptibility and the field-cooled susceptibility. This difference demonstrates a breakdown of ergodicity in the glassy phase. © 1995 American Institute of Physics.