Hydrogen shallow donors in Co-doped ZnO showing room-temperature ferromagnetism |
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Institution: | 1. Department of Physics and Institute for Nano Science, Korea University, 5-1 Anam-dong, Sungbuk-ku, Seoul 136-713, Republic of Korea;2. Department of Applied Physics, Dankook University, Yongin 448-701, Republic of Korea |
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Abstract: | Room-temperature ferromagnetism has been identified in sol–gel-prepared Co-doped ZnO (ZnCoO), hydrogen being incorporated by a linear polymer polyvinyl pyrrolidone. The magnetic order was investigated by the X-ray photoemission and magnetization measurements in view of the interstitial hydrogen being coupled with Co2+. The electron paramagnetic resonance measurements revealed that hydrogens not contributing to the magnetic order occupy the shallow donor levels in the hydrogenated ZnCoO system. |
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Keywords: | ZnCoO Sol–gel processing H-induced room-temperature ferromagnetism Electron paramagnetic resonance |
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