A key to room-temperature ferromagnetism in Fe-doped ZnO: Cu

Han, S-J.; Song, J. W.; Yang, C.-H.; Park, S. H.; Park, J.-H.; Jeong, Y. H.; Rhie, K. W.
November 2002
Applied Physics Letters;11/25/2002, Vol. 81 Issue 22, p4212
Academic Journal
Successful synthesis of room-temperature ferromagnetic semiconductors, Zn[SUB1-x]Fe[SUBx]O, is reported. The essential ingredient in achieving room-temperature ferromagnetism in bulk Zn[SUB1-x]Fe[SUBx]O was found to be additional Cu doping. A transition temperature as high as 550 K was obtained in Zn[SUB0.94]Fe[SUB0.05]Cu[SUB0.01]O; the saturation magnetization at room temperature reached a value of 0.75 μ[SUBB] per Fe. A large magnetoresistance was also observed below 100 K.


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