Abstract
Far-infrared reflectivity spectra of phases I, II and III of potassium nitrate were obtained over a range of 20-400 cm-1. The two infrared active lattice modes observed are described by parameters obtained from a classical oscillator analysis, which was confirmed by a Kramers-Kronig analysis. From the temperature dependence of the mode parameters and their contribution to the dielectric constant it was concluded the paraelectric phase I is a disordered arrangement of electric dipoles. From this it follows that the paraelectric-to-ferroelectric phase change is an order-disorder transition.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
