Magnetic head with stray flux compensation.

摘要

A magnetic disc apparatus includes a read and write head (1) having a read and write coil (6), an erase head (7) at opposite sides of the read and write head (1) for erasing data at the opposite sides of the read and write head (1) and having an erase coil (9), and a leakage magnetic flux cancelling coil (21) wound on the read and write head (1) and being energized with a d.c. current for cancelling the leakage magnetic flux from the erase head (7) when the erase coil (9) is energized with a d.c. current.