01358nas a2200157   4500008004100000022001400041245008400055210006900139260012500208300002300333490000700356520068100363100001801044700002501062856011301087       2006                        eng d  a0003-695100aFerromagnetism induced by hydrogen in polycrystalline nonmagnetic Zn0.95Co0.05O0 aFerromagnetism induced by hydrogen in polycrystalline nonmagneti  aCIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USAbAMER INST PHYSICScJUL  aArticle No. 0325080 v893 a<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>1 aDeka, Sasanka1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/ferromagnetism-induced-hydrogen-polycrystalline-nonmagnetic-zn095co005o-1