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Ferromagnetism in Fe‐doped ZnO bulk samples with additional Cu doping
Author(s) -
Wang Y. Q.,
Su L.,
Liu L.,
Tian Z. M.,
Chang T. Q.,
Wang Z.,
Yin S. Y.,
Yuan S. L.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925566
Subject(s) - wurtzite crystal structure , ferromagnetism , doping , coprecipitation , materials science , x ray photoelectron spectroscopy , analytical chemistry (journal) , valence (chemistry) , magnetization , magnetic moment , phase (matter) , condensed matter physics , nuclear magnetic resonance , zinc , inorganic chemistry , chemistry , metallurgy , magnetic field , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics
Room‐temperature (RT) ferromagnetism (FM) has been observed in Fe‐doped ZnO bulk samples fabricated by a coprecipitation method, and the effect of additional Cu doping on magnetic properties of the samples has been investigated. The results of XRD show that all doping samples are single‐phase with a wurtzite structure. X‐ray photoelectron spectroscopy reveals that Fe is in 3+ state substituting for Zn in the sample without Cu doping, however, Fe shows a mixed oxidation state of 2+ or 3+ in the sample with additional Cu doping, where Cu is 1+ valence. Magnetic measurements indicate that additional Cu doping enhances the FM of the system, and the magnetization increases gradually with the increasing Cu content x up to 1%. The observed RT FM was attributed to the ferromagnetic coupling between Fe 3+ ions mediated by holes.