Cubic ZnMgO alloys Synthesized by Pulsed Laser Deposition
Abstract
We have recently synthesized Mg_xZn_1-xO hexagonal alloy single crystal film with (x) varying between 0.0-0.34 by pulsed laser deposition (PLD). Excellent optical properties such as extremely bright photoluminescence at room temperature and band gap variable up to 4.0 eV were the salient features of that work. In the pursuit of further improving research efforts in this area, we have, in this work, synthesized epitaxial cubic Zn_xMg_1-xO films with (x) up to 0.2 on MgO substrate using PLD. In this composition range, the alloy phase is cubic with lattice constants close to the MgO. This new system allows to integrate wide band bag ZnMgO films with Si which has also been demonstrated in this work using TiN as a buffer layer. The characterization of these layers was done using X-ray diffraction (XRD) and high resolution microscopy (HRTEM), Rutherford Backscattering spectroscopy (RBS) and ion channeling. The ion channeling yield as low as 3% was obtained in these films indicating a superior quality of the grown material. The defects and interfaces have been characterized by HRTEM as a function of (x) in the films.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2000
- Bibcode:
- 2000APS..MARB18010N