Structural characterization and ferroelectric properties of strontium barium niobate (Sr xBa1-xNb2O6) thin films

Autor(es)

R.G. Mendes ^[1] ; E.B. Araújo ^[2] ; J.A. Eiras ^[3]

Afiliação do(s) autor(es)

^[1] Universidade Federal de São Carlos. Departamento de Engenharia de Materiais - Brasil

^[2] Universidade Estadual Paulista. Departamento de Física e Química - Brasil

^[3] Universidade Federal de São Carlos. Departamento de Física. Grupo de Cerâmicas Ferroelétricas - Brasil

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 4, n. 2, p. 113-116, 2001-00-00.

Resumo

Strontium barium niobate (SBN) thin films of good quality were deposited on Pt/Ti/SiO2/Si substrate using a polymeric resin containing metallic ions. Films were crystallized at different temperatures and for different duration of time. The structure of these films was studied using X-ray diffraction. The coexistence of SrNb2O6 (SN) and SBN was observed in films crystallized at 700 °C. The amount of SN decreases when the crystallization time increases. Ferroelectric properties were determined for films crystallized at 700 °C for 1 and 5 h. For SBN film crystallized at 700 °C for 1 h, the remanent polarization (Pr) and the coercive field (Ec) were 2.6 muC/cm² and 71.9 kV/cm, respectively. For the film crystallized at 700 °C for 5 h these parameters were Pr = 1.1 muC/cm² and Ec = 50.5 kV/cm. (AU)

• Processo FAPESP: 99/02485-2 - Síntese, deposição e caracterização dielétrica e ferroelétrica de filmes finos
• Beneficiário: Eudes Borges de Araújo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado