A large output, a high sensitivity, and a broad bandwidth
were realized by adopting a cordeadkore head element with
a multilayer film core and the impedance matching
technique. The head was estimated to exhipt a sensitivity
of 4 mV/pm *Oe, a field resolution of - 10- Oe, and a 3 dB
bandwidth of >IO0 MHz in addition to a full output of
20.5- 127 mVpdpm.