Ultraviolet Laser Action in Ferromagnetic Zn_{1&#8722;<it>x</it>}Fe_<it>x</it>O Nanoneedles

Abstract

Abstract Fe-doped ZnO nanoneedles (NDs) were fabricated by an Ar+ ion sputtering technique operated at room temperature. The as-grown samples show both ferromagnetic and lasing properties. The saturated magnetization moment was measured from 0.307 to 0.659 emu cm−3 at the field of 10 kOe with various Fe concentrations. Intense ultraviolet random lasing emission was observed from Zn1 − x Fe x O NDs at room temperature. The X-ray photoelectron spectroscopy result reveals that the doped Fe atoms occupy the Zn sites and lead to a decrease in oxygen deficiency.

Keywords

• Zn_{1 &#8722; <it>x</it>}FexO
• Nanoneedles
• Ferromagnetic
• Random lasing
• Ion beam