Ultraviolet laser action in ferromagnetic Zn1-xFexO nanoneedles

• Main Authors: Yang, H. Y., Yu, S. F., Lau, S. P., Herng, T. S., Tanemura, M.
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2010
• Subjects: DRNTU::Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/84781; http://hdl.handle.net/10220/6271; http://www.springerlink.com/content/r517745035734j01/
• Institution: Nanyang Technological University

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.