Magnetic Properties of Heavy Ion Implanted Monocrystalline ZnO |
| J. Goska, R. Puźniakb, A. Lynnykb
aFaculty of Physics, Warsaw University of Technology, Koszykowa 75, PL-00662 Warsaw, Poland bInstitute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, PL-02668 Warsaw, Poland |
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| Magnetization of monocrystalline ZnO samples implanted with magnetic Co and with Ar and Kr noble gases ions, with energies and doses creating comparable damage, was studied as a function of magnetic field (H) at constant temperature in the temperature range between 2 and 300 K and as a function of temperature for H=1 kOe and 10 kOe. In the Co-implanted ZnO, paramagnetic and some residual ferromagnetic/superparamagnetic phases were revealed, while the Kr- and Ar-implantations do not introduce magnetic centers. The existence of ferromagnetic/superparamagnetic residual phases in the Co-implanted layer was confirmed in the measurements of zero-field cooled/field cooled magnetization at H=10, 50, and 500 Oe and gave a rise to hysteresis loop appearing in the low temperature range from 2 to 15 K. |
DOI:10.12693/APhysPolA.141.123 topics: ZnO, heavy-ion implantation, magnetic properties |