Ferromagnetism in Fe-Implanted a-plane ZnO Films

Journal Article · Sat Dec 31 23:00:00 EST 2005 · Appl. Phys. Lett.

DOI:https://doi.org/10.1063/1.2213519· OSTI ID:914380

Wu, P; Saraf, G; Lu, Y; Hill, D; Gateau, R; Wielunski, L; Bartynski, R; Arena, D; Dvorak, J

Fe ions of dose 5x10{sup 16} cm{sup -2} were implanted at 200 keV into a-plane ZnO epitaxial films. The epitaxial quality of the postannealed samples was verified by x-ray diffraction {omega}-rocking curves and {phi} scans, whereas x-ray absorption spectroscopy identified the presence of both Fe{sup 2+} and Fe{sup 3+} ions, as well as changes in their relative concentration during postannealing. Superconducting quantum interference device measurements show that the as-implanted and postannealed films are ferromagnetic at room temperature. The saturation magnetization reduces during annealing possibly due to the decrease in the number of oxygen vacancies.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 914380
• Report Number(s): BNL--78948-2007-JA
• Journal Information: Appl. Phys. Lett., Journal Name: Appl. Phys. Lett. Vol. 89; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ABSORPTION SPECTROSCOPY
ANNEALING
FERROMAGNETISM
MAGNETIZATION
OXYGEN
SATURATION
SQUID DEVICES
VACANCIES
X-RAY DIFFRACTION
national synchrotron light source