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Published on: March 24, 2019
Ultraviolet Laser Action in Ferromagnetic Zn1-xFexO Nanoneedles
1School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang, 639798, Singapore. hyyang@ntu.edu.sg.
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 - xFexO 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.

