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Ferromagnetism in Fe-doped ZnO bulk samples with additional Cu doping

✍ Scribed by Wang, Y. Q. ;Su, L. ;Liu, L. ;Tian, Z. M. ;Chang, T. Q. ;Wang, Z. ;Yin, S. Y. ;Yuan, S. L.

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
332 KB
Volume
207
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

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.

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