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Reconstruction of the nonequilibrium spin glass order parameter in relaxor ferroelectric lead magnesium niobate

Authors
Journal
Journal of Physics and Chemistry of Solids
0022-3697
Publisher
Elsevier
Publication Date
Volume
61
Issue
2
Identifiers
DOI: 10.1016/s0022-3697(99)00290-5
Keywords
  • D. Ferroelectricity
  • Permittivity

Abstract

Abstract We performed a reconstruction for the order parameter of nonequilibrium spin glass state of PbMg 1/3Nb 2/3O 3 based on the dielectric response theory in relaxor ferroelectrics, which takes into account the competition between local glass like freezing and the critical slowing down of the dynamics in highly polarizable materials. The resultant values for the degree of local freezing rather small even at temperatures where the field-cooled permittivity exceeds the frequency dependent permittivity by an order of magnitude. This observation indicates the significant role of the critical slowing down (accompanied the glass freezing) in the system dynamics.

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