High Curie point CaBi2Nb2O9 thin films: A potential candidate for lead-free thin-film piezoelectrics
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Data
2006-10-01
Autores
Simoes, A. Z.
Ries, A.
Riccardi, C. S.
Gonzalez, A. H. M.
Longo, Elson [UNESP]
Varela, José Arana [UNESP]
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American Institute of Physics (AIP)
Resumo
CaBi2Nb2O9 (CBNO) thin films deposited on platinum coated silicon substrates by the polymeric precursor method exhibited good structural, dielectric, and piezoelectric characteristics. Capacitance-voltage measurements indicated good ferroelectric polarization switching characteristics. Remanent polarization and drive voltage values were 4.2 mu C/cm(2) and 1.7 V for a maximum applied voltage of 10 V. The film has a piezoelectric coefficient d(33) equal to 60 pm/V, current density of 0.7 mu A/cm(2), and Curie temperature of 940 degrees C. The polar-axis-oriented CBNO is a promising candidate for use in lead-free high Curie point in ferroelectric and piezoelectric devices. (c) 2006 American Institute of Physics.
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Journal of Applied Physics. Melville: Amer Inst Physics, v. 100, n. 7, 4 p., 2006.