Information storage devices using magnetic domain wall movement and methods of operating the same

A method of operating an information storage device including a magnetic track having a plurality of magnetic domains and a magnetic domain wall between each pair of adjacent magnetic domains, the information storage device further including an operating unit having a size sufficient to cover at least two adjacent magnetic domains among the plurality of magnetic domains, the method comprising:

• recording information on the magnetic track, the recording of the information including,
• magnetizing all of the plurality of magnetic domains covered by the operating unit in a first direction by supplying a first write current to the operating unit.

A method of operating an information storage device including a magnetic track having a plurality of magnetic domains and a magnetic domain wall arranged between each pair of adjacent magnetic domains, the information storage device further including a magnetic domain wall moving unit and an operating unit, the magnetic domain wall moving unit is connected to the magnetic track and the operating unit has a size sufficient to cover at least two magnetic domains among the plurality of magnetic domains, the method comprising:

• moving the magnetic domain walls of the magnetic track by one bit;
• and
• determining a type of information in a magnetic domain moved into a first region of the magnetic track by the movement of the magnetic domain walls, the first region of the magnetic track being a region of the magnetic track on which the operating unit is disposed.