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.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (Nos. 2013057555, 201234779 , and NRF-2010-0027963). K.W.L. was supported by a Korea University Grant . The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.
Copyright 2013 Elsevier B.V., All rights reserved.
- Electron paramagnetic resonance
- H-induced room-temperature ferromagnetism
- Sol-gel processing
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)