Study of Domains and Size Effect of Curie Temperature in BaTiO3 Nanoceramics

Chao Fang; Liang Yan Chen

doi:10.4028/www.scientific.net/AMR.690-693.542

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Fabrication of ZrB₂-Based Ceramics Doped with ZrSi₂
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 690-693Study of Domains and Size Effect of Curie...

Study of Domains and Size Effect of Curie Temperature in BaTiO₃ Nanoceramics

Abstract:

Domains and size effect of Curie temperature in BaTiO₃ nanoceramics has been studied in this paper. We have calculated Coulomb interaction in a single domain of multi-domains BaTiO₃grain, and obtained Curie temperature at various grain size. The results show that along with the grain size decreases, the change of Coulomb interaction depends on type of domains. 90 degree domains cause Coulomb interaction increase and Curie temperature moves to high temperature; 180 degree domains make Coulomb interaction weak and Curie temperature moves to low temperature. The results are compared with experimental data.