Preparation of nanometric Cu/sub x/Fe/sub 1-x/OFe/sub 2/O/sub 3/ and design of a magnetic field system for treatment of tumor

The water-based magnetic fluids with nanometric Cu/sub x/Fe/sub 1-x/OFe/sub 2/O/sub 3/ particles were prepared by the two-step method, in which the x value varied 0.1 to 0.4. The magnetization decreased with increasing x values. Also, an external magnetic field system was designed for drug delivery, with which the spatial magnetic flux distribution was analyzed.