Abstract
The Raman, infrared reflectivity and terahertz spectra of A-site deficient scheelite materials (Ca1−3xBi2xΦx)MoO4 (Φ: A-site vacancy) were studied to evaluate the correlation between the vibrational modes and the dielectric properties. The Raman spectra were fitted with the Lorentzian model and the changes of resonance frequencies and full width at half maximum of the resonance were discussed. With the substitution of Bi into the A site of CaMoO4, the associated ionic compensation produces an increase in disorder which can contribute to an increase in dielectric losses. The harmonic oscillator model was used to fit infrared reflectivity spectra and the obtained complex dielectric response was extrapolated down into the terahertz and microwave region. The contributions of each mode to the microwave dielectric properties were investigated. It was found that the modes at low frequencies which are related to AO8 polyhedra play the most important role in the microwave dielectric properties of (Ca1−3xBi2xΦx)MoO4.
Sign-in/Register to access full text options 
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.
