Racetrack memory is a type of non-volatile, solid
memory being developed by IBM.
Racetrack memory works by storing oppositely oriented magnetic regions in nanowires called
racetracks. Electric pulses, which are generated by a transistor, are applied
to the nanowires, creating domain walls with regions between them. When regions pass over a quantum mechanical
magnetic read/write head, they are oriented in opposite directions. Oriented one way, a bit represents a "1". Oriented
the other way, it represents a "0".
Racetrack memory, along with phase change memory,
is being looked by IBM as a way to develop solid-state devices
capable of holding up to 100 times more data than is possible today.
This was last updated in January 2012
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