Relaxor-like behavior of mechanically activated ultrafine SrTiO3

Dielectric properties of nanostructured strontium titanate samples sintered from nanoparticles obtained by grinding of previously synthesized SrTiO 3 and nanoparticles obtained by chemical deposition were studied in the temperature range 10-300 K. The first sample shows the characteristic features o...

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Bibliographic Details
Published inFerroelectrics. Letters section Vol. 47; no. 1-3; pp. 1 - 8
Main Authors Korotkov, L. N., Bulgakov, O. M., Bocharov, A. I., Al Jaafari, F. D.
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 24.01.2020
Taylor & Francis Ltd
Subjects
Activated sintering
Dielectric properties
Dielectric relaxation
Elastic deformation
Electrical properties
ferroelastic domains
Ferroelectricity
High temperature
Nanoparticles
Relaxors
Strontium
strontium titanate
Strontium titanates
Submicron
Ultrafines
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Summary:Dielectric properties of nanostructured strontium titanate samples sintered from nanoparticles obtained by grinding of previously synthesized SrTiO 3 and nanoparticles obtained by chemical deposition were studied in the temperature range 10-300 K. The first sample shows the characteristic features of a relaxor ferroelectric. The dispersion of the dielectric response observed in the vicinity of 40 K is characterized by two relaxation processes, with broad spectra of relaxation times. It is assumed that the "high-temperature" relaxation process is associated with the dynamics of the elastic domain. Possible mechanisms for the interaction of elastic deformation and polarization are discussed.
ISSN:0731-5171
1563-5228
DOI:10.1080/07315171.2020.1799626