Electric-field-induced diffusion-limited aggregation (EDLA) fractals formed by the suspended metal microspheres in an oil are observed experimentally. The formation of an EDLA fractal is due to the interaction of the dipole-dipole force induced on the metal microspheres when these microspheres are presented in an external electric field. The EDLA fractal grows as the applied field strength is slowly increased. At a fixed volume fraction phi, the dimensions D-f of all fractals formed under the different space fields are in the range of 1.72+/-0.1. We find that the fractal dimension D-f changes as the volume fraction phi of metal particles varies and satisfies the relationship of D-f similar to phi(m), where m is approximately 1.52.
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