Abstract
We have investigated properties of the Cu-doped ZnO crystalline film synthesized by the hydrothermal method. X-ray diffraction and X-ray photoelectron spectroscopy results provide the evidence that Cu2 + is incorporated into the ZnO lattices. Photoluminescence spectrum of the rod arrays shows that the UV emission peak shifts a little to lower energy and its intensity decreased. There are another two emission peaks centred in blue and green regions because of the incorporation of Cu2 + ions. The rod arrays have exhibited room-temperature ferromagnetic behaviour with the remanence of 0·926 × 10 − 3 emu/cm3. We suggest that the exchange interaction between local spin-polarized electrons (such as the electrons of Cu2 + ions) and conductive electrons is the cause of room-temperature ferromagnetism.
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XIA, C.H., HU, C.G., HU, C.H. et al. Room-temperature ferromagnetic properties of Cu-doped ZnO rod arrays. Bull Mater Sci 34, 1083–1087 (2011). https://doi.org/10.1007/s12034-011-0154-9
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DOI: https://doi.org/10.1007/s12034-011-0154-9