| 摘要 |
<p>Disclosed herein is a magnetic apparatus comprising: a nagnetic circuit including magnetic yoke (11) and a magnet 12), with a magnetic gap (15) formed in the circuit for forming i uniform d.c. bias magnetic field in the magnetic gap (15); a nagnetic device made (16) of magnetic material of certain composition and placed in the magnetic gap (15) so that the ievice operates in the d.c. bias magnetic field; and a soft mag- ietic plate (13) provided in the magnetic gap (15), the soft nagnetic plate (13) being made of magnetic material having composition substantially identical to the composition of the nagnetic device.</p> |
