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    • C G Hu

      Articles written in Bulletin of Materials Science

    • Volume 34 Issue 5 August 2011 pp 1083-1087

      Room-temperature ferromagnetic properties of Cu-doped ZnO rod arrays

      C H Xia C G Hu C H Hu Z Ping F Wang

      More Details Abstract Fulltext PDF

      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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