Nanoscale Switching Behavior and Electronic Properties of Ultrathin Ferroelectric Structures

Nanoscale Switching Behavior and Electronic Properties of Ultrathin Ferroelectric Structures


December 15, 2011 - 6:00am


Howey N110

mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:AR-SA">Over the last several years the field of ferroelectric and multiferroic oxides has been experiencing a significant revival. This is largely due to recent experimental advances allowing characterization of their functional properties down to the nano- and atomic scale. Specifically, Piezoresponse Force Microscopy (PFM) proved to be an indispensable tool for high-resolution characterization of ferroelectrics. Although, the standard implementation of this technique has been around for almost 15 years, recent years have witnessed the development of advanced modes of PFM such as resonance-enhanced PFM, stroboscopic PFM, switching spectroscopy PFM and so on. This lecture will focus on application of the advanced PFM modes to investigation of the dynamic switching and electronic properties of ferroelectric nanostructures. This will include critical polarization behavior in single-crystalline mso-bidi-font-family:Times-Roman;mso-ansi-language:EN-US;mso-fareast-language:
EN-US;mso-bidi-language:EN-US">ultrathin (in the range from 6 to 24 unit cells) BaTiO mso-bidi-font-family:Times-Roman;mso-ansi-language:EN-US;mso-fareast-language:
"Times New Roman";mso-bidi-font-family:Times-Roman;mso-ansi-language:EN-US;
mso-fareast-language:EN-US;mso-bidi-language:EN-US">-based heterostructures, polarization-driven tunneling electroresistance effect and electric modulation of magnetization in layered ferroelectric-ferromagnetic heterostructures. T "Times New Roman";mso-ansi-language:EN-US;mso-fareast-language:EN-US;
mso-bidi-language:AR-SA">he structural disorder effect on domain switching dynamics in ferroelectric polymers will be discussed as well.