title: Ultraviolet Laser Action in Ferromagnetic Zn1-xFexO Nanoneedles.
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.
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang, 639798, Singapore. hyyang@ntu.edu.sg.
authors.forename: Hy
authors.initials: H
authors.lastname: Yang
authors.forename: Sf
authors.initials: S
authors.lastname: Yu
authors.forename: Sp
authors.initials: S
authors.lastname: Lau
authors.forename: Ts
authors.initials: Ts
authors.lastname: Herng
authors.forename: M
authors.initials: M
authors.lastname: Tanemura