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Ferromagnetism induced by hydrogen in polycrystalline nonmagnetic Zn0.95Co0.05O.
- Source :
-
Applied Physics Letters . 7/17/2006, Vol. 89 Issue 3, p032508. 3p. 3 Graphs. - Publication Year :
- 2006
-
Abstract
- Polycrystalline Zn0.95Co0.05O is found to be paramagnetic at room temperature and down to 12 K. Optical measurements prove the incorporation of Co2+ ions inside the ZnO lattice in the tetrahedral site. When the paramagnetic sample is heated in Ar/H2 at 1125 K for 2 h, ferromagnetism with a very high value of magnetization is observed at room temperature. Hydrogen reduction does not affect the substituted Co2+ ions inside the wurtzite crystal lattice as evidenced from optical studies. X-ray diffraction studies show the presence of Co metal after the reduction process which is the origin of room temperature ferromagnetism. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 89
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 21845200
- Full Text :
- https://doi.org/10.1063/1.2227642