Effect of substrate temperature on pulsed laser ablated Zn0.95Co0.05O diluted magnetic semiconducting thin films
- 1 April 2007
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 101 (7), 073902
- https://doi.org/10.1063/1.2715841
Abstract
Room temperature ferromagnetic thin film with (002) preferential orientation has been deposited by pulsed laser deposition at different substrate temperatures on -type (100) silicon substrate. A maximum saturation magnetization of was achieved at room temperature. High-resolution transmission electron microscope and x-ray photoelectron spectroscopy results indicate that this ferromagnetism behavior is not due to Co microclusters in the thin film. Zinc interstitials, oxygen vacancies, and lattice defects induced by low substrate deposition temperature show a significant effect on ferromagnetic behavior. By changing the substrate deposition temperature to control the amount of zinc interstitials, oxygen vacancies, and lattice defects, ferromagnetism can be tuned significantly as well, which is a direct evidence that these defects contributed to the ferromagnetism in ZnO:Co thin films.
Keywords
This publication has 21 references indexed in Scilit:
- Effect of working pressure and temperature on ZnO film deposited on free-standing diamond substratesTransactions of Nonferrous Metals Society of China, 2006
- Donor impurity band exchange in dilute ferromagnetic oxidesNature Materials, 2005
- Reversible 300 K Ferromagnetic Ordering in a Diluted Magnetic SemiconductorAdvanced Materials, 2004
- Study of diluted magnetic semiconductor: Co-doped ZnOApplied Physics Letters, 2002
- Molecular beam epitaxy of wurtzite (Ga,Mn)N films on sapphire(0001) showing the ferromagnetic behaviour at room temperatureJournal of Crystal Growth, 2002
- Magnetic and electric properties of vanadium doped ZnO filmsSolid State Communications, 2001
- Spintronics: A Spin-Based Electronics Vision for the FutureScience, 2001
- Intrinsicn-type versusp-type doping asymmetry and the defect physics of ZnOPhysical Review B, 2001
- Making Nonmagnetic Semiconductors FerromagneticScience, 1998
- Diluted magnetic semiconductorsJournal of Applied Physics, 1988