Effect of bismuth on improvement of faraday effect in YFeO3 thin films grown by PLD

Abstract

Thin magnetic films have been prepared by pulsed-laser deposition from targets of the orthoferrites: Y1- xBixFeO= (x=0, 0.1, 0.15 and 0.2). The targets created by sol-gel method and characterized via X-ray diffraction, Scanning electron microscope. All layers were deposited onto quartz substrates in a vacuum chamber evacuated down to 4×10-5 mbar and the oxygen ambient gas pressure was 150mbar. After deposition, films were recrystallized with annealing procedure at 600 °C for 40 minutes. The magnetic behavior of the thin films was investigated using Faraday rotation measurement setup under a DC magnetic field. The results show that Faraday rotation angle increases as Bi content increases.