@article { ISI:000239174100073,
	title = {Ferromagnetism induced by hydrogen in polycrystalline nonmagnetic Zn0.95Co0.05O},
	journal = {Applied Physics Letters},
	volume = {89},
	number = {3},
	year = {2006},
	month = {JUL},
	pages = {Article No. 032508},
	publisher = {AMER INST PHYSICS},
	type = {Article},
	address = {CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA},
	abstract = {<p>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/H-2 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. (c) 2006 American Institute of Physics.</p>},
	issn = {0003-6951},
	doi = {10.1063/1.2227642},
	author = {Deka, Sasanka and Joy, Pattayil Alias}
}
