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Article Dans Une Revue Journal of Applied Physics Année : 2005

Acoustic emission and nonergodic states of the electric-field-induced-phase transition of PbMg1/3Nb2/3O3

Résumé

Acoustic emission (AE) method was used to investigate the electric-field-induced-phase transition in the well-known relaxor Pb(Mg1/3Nb2/3)O-3 (PMN). We show that in the field cooling process the induced-phase transition is accompanied by an AE signal, which reflects relaxation of the strong stress, associated with arising of a macroscopic domains structure similar to martensitic phase transition. However, using a procedure in which the field is applied after a zero field cooling, no AE signal is detected even after a very long time higher than expected for the appearance of the induced-phase transition. The comparison with previous x-ray-diffraction results allowed to get in the last case interesting insights on the local and long-range polar order of the induced ferroelectric state because of absence of the relaxation of the strong stress due to percolation mechanism of this phase transition
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Dates et versions

hal-00114941 , version 1 (19-11-2006)

Identifiants

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B. Dkhil, E. Dul'Kin, M. Roth, Jean-Michel Kiat. Acoustic emission and nonergodic states of the electric-field-induced-phase transition of PbMg1/3Nb2/3O3. Journal of Applied Physics, 2005, 98 (2), pp.Art. No. 023520. ⟨10.1063/1.1980527⟩. ⟨hal-00114941⟩
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