(Page 2 of 2)
A Year's Worth of Movies
Big Blue's goal is to boost device storage capacities by a factor of 100 times greater that what is currently available today from conventional memory devices. This would enable hardware makers to design portable gadgets capable of storing all the movies produced worldwide in a single year -- and with room to spare, IBM researchers said.
To make such memory densities possible, however, the domain walls of the nanowire racetrack must be manipulated at speeds of hundreds of miles per hour to atomically precise positions along the tracks. According to IBM researchers, the timescales in the tens of nanoseconds and the distances in micrometers are surprisingly long, given that research efforts over the past 50 years were unable to detect them.
"This was previously undiscovered in part because it was not clear whether the domain walls actually had mass, and how the effects of acceleration and deceleration could exactly compensate one another," Parkin said.
IBM researchers have just published their results in the Dec. 24 issue of Science. The paper by Luc Thomas, Rai Moriya, Charles Rettner, and Stuart Parkin of IBM Research is entitled, "Dynamics of magnetic domain walls under their own inertia."