Accession Number : AD0688155

Title :   CONTINUUM AND LATTICE THEORIES OF INFLUENCE OF ELECTRO-MECHANICAL COUPLING ON CAPACITANCE OF THIN DIELECTRIC FILMS.

Descriptive Note : Interim technical rept. no. 4,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Mindlin,R. D.

Report Date : MAR 1969

Pagination or Media Count : 31

Abstract : It is suggested that an anomaly, observed by C.A. Mead in measurements of the capacitance of thin dielectric films, may be due to an electromechanical effect not accounted for in the classical, continuum theory of piezoelectricity. A solution of equations that include the additional effect is shown to be capable of accommodating the experimental data. It is demonstrated that the augmented equations, rather than the classical ones, are a continuum approximation to the equations of a lattice of shell-model atoms. Analogous equilibrium solutions of the lattice and continuum equations are almost identical. (Author)

Descriptors :   (*DIELECTRIC FILMS, CAPACITANCE), (*CAPACITANCE, ANOMALIES), PIEZOELECTRIC EFFECT, ELECTROSTATICS, ATOMIC STRUCTURE, CRYSTAL LATTICES, POLARIZATION

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE