Faraday rotation observations of magnetic fields generated by a high-power (λ=1.06 μm) laser focused on various targets have been made. Results indicate that the fields produced on spherical targets may depend strongly on the target capacitance. Strongly structured fields were observed using large prepulse-formed plasmas on wire targets. Using novel composition discontinuity targets and a UV probe beam, planar magnetic fields were noted and toroidal fields in the critical density region measured.