Dipole moment and spontaneous polarization of ferroelectric nanoparticles in a nonpolar fluid suspension

✍ Scribed by Basun, S. A.; Cook, G.; Reshetnyak, V. Yu.; Glushchenko, A. V.; Evans, D. R.

• Book ID: 120256702
• Publisher: The American Physical Society
• Year: 2011
• Tongue: English
• Weight: 523 KB
• Volume: 84
• Category: Article
• ISSN: 1098-0121
• DOI: 10.1103/PhysRevB.84.024105

✦ Synopsis

Stressed ferroelectric nanoparticles, less than 10 nm in diameter, are investigated in a nonpolar fluid. Measuring ferroelectric properties of the smallest achieved BaTiO 3 ferroelectric nanoparticles allows for the determination of dipole moment and spontaneous polarization as a function of size and concentration; the results are significantly greater than in bulk BaTiO 3 . This is achieved by using a direct measurement of the displacement current density and either integrating over half a period or fitting the experimental results using the derivative of the Langevin function.