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NIST Microscope Measures Nanomagnet Property Vital to ‘Spintronics’

Uniform spin waves could dramatically reduce the energy required to write a bit

NIST
Fri, 03/15/2013 - 10:51
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Researchers at the National Institute of Standards and Technology (NIST) have developed a new microscope able to view and measure an important but elusive property of the nanoscale magnets used in an advanced, experimental form of digital memory. The new instrument already has demonstrated its utility with initial results that suggest how to limit power consumption in future computer memories.

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NIST’s heterodyne magneto-optic microwave microscope, or H-MOMM, can measure collective dynamics of the electrons’ spins—the basic phenomenon behind magnetism—in individual magnets as small as 100 nanometers in diameter. Nanomagnets are central components of low-power, high-speed “spintronic” computer memory, which might soon replace conventional random-access memory (RAM). Spintronics relies on electrons behaving like bar magnets, pointing in different directions to manipulate and store data, whereas conventional electronics rely on charge.

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