Influence of Elastic and Optical Properties on AgFeO2 and AgCrO2 Delafossite to be Applied in High-Frequency Applications.

Nanometric AgFeO₂ and AgCrO₂ delafossite were easily prepared by the flash auto-combustion method. The two main bands estimated from FTIR (Fourier-transform infrared) analysis were the tetrahedral A-site (573 cm⁻¹ for AgFeO₂, 630 cm⁻¹ for AgCrO₂) and the octahedral B-site (484 cm⁻¹ for AgFeO₂, 595 cm⁻¹ for AgCrO₂). This study is mainly focused on the elastic properties evaluated from the FTIR analysis and showed that AgCrO₂ delafossite is more elastic than AgFeO₂ delafossite. The elastic properties can be explained by studying the longitudinal and transverse velocities. Owing to the optical properties results, AgCrO₂ delafossite is a promising material to be applied in optical devices. However, AgFeO₂ delafossite is a promising material in magnetic applications because it showed a large switching field distribution by 9-fold more than that of AgCrO₂ delafossite. Moreover, high-frequency applications were calculated from the magnetic analysis and showed that both samples could be applied in ultra-high microwave applications. [ABSTRACT FROM AUTHOR]