Anisotropic delafossite-type CuFeO2 thin films deposited by electrospinning with rotating collector

Abstract

Delafossite CuFeO2 anisotropic thin films were prepared by electrospinning method with rotating collector. The pure phase CuFeO2 anisotropic thin films were prepared by heat treatment at 773 K in the air for 600 s and 1023 K under nitrogen for 600 s. Besides, an electrospinning process rotation speed influence on the CuFeO2 film formation. The delafossite-type CuFeO2 films were identified by X-ray diffraction and field emission scanning electronic microscopy. High-speed rotating collector were used to prepare the anisotropic thin film. Glass substrates were fixed on a rotating collector and rotated at speeds of 1003000 rpm. The optical and electrical properties of the prepared CuFeO2 thin film were measured by ultravioletvisible spectrometry and two-point probe method, respectively. The electrical resistance of the macroscopically anisotropic CuFeO2 thin films in the parallel and vertical directions showed a difference of 23 orders.