| 摘要 |
A magnetic field generator which is manufactured by a simple manufacturing technique such as plating and in which an eddy current is suppressed, and a magneto-optical information storage device capable of the high-speed recording/reproduction of data. An annular coil (311) surrounds an inner hole. A plurality of magnetic rods (312) insulated from the coil (311) and made of a magnetic material are radially arranged with the inner hole of the coil (311) at the center so as to be placed on the coil (311). The rods (312) have a maximum width and a minimum width, and the ratio between them is two or less.
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