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Thursday, July 04, 2002
http://www.nanotech-planet.com/briefs/article/0,4028,6551_1378841,00.html Nanoscale Sensor Could Increase Data Storage Capacity By Michael Pastore Researchers at the State University of New York at Buffalo have developed an extremely sensitive nanoscale device that could shrink ultra-high-density storage devices to incredibly small sizes. The magnetic sensor, made of nickel and only a few atoms in diameter, could increase data storage capacity by a factor of a thousand or more and could ultimately lead to supercomputing devices as small as a wristwatch. The effect created with the new nickel device is called ballistic magneto-resistance (BMR). It addresses a major hurdle facing advances in magnetic storage — that as stored bits of data get smaller, their magnetic field gets weaker, which makes the bits harder to read. Reliable reading of the data depends on producing a large enough magnetically-induced change in the electrical resistance of the sensor. The BMR experiment exhibited a record change in sensor resistance of more than 3,000 percent....
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