抄録
A new type of magnetic microprobe is presented by which surface anomalies of magnetic or conductive materials is detected with enhanced spatial resolution and sensitivity. The probe is fabricated using a pair of thin amorphous wires bent in a U-shape, on each of which two identical copper wire coils are wound. The four identical coils are connected so as to make a bridge circuit, where two coils on the same wire core are placed at opposing sides with the mutual coupling positive. Characteristics of the new probe are investigated including point spread function (PSF), spatial resolution and senstivity with reference to those of a Dahle type microprobe which is realized with the same assembly but changing connections of the four coils.
