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Researchers Tap Antiferromagnets for Better RAM

By IEEE Spectrum

September 9, 2021

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An international team of scientists has found that antiferromagnets could make computer memory significantly faster and more efficient.

Magnetoresistive random-access memory (MRAM) could employ antiferromagnets instead of ferromagnets, avoiding disruption by external magnetic fields and limited density scalability.

Antiferromagnets' magnetic properties also suggest antiferromagnet-equipped MRAM can write and rewrite data thousands of times faster than ferromagnet-based MRAM.

The team exposed antiferromagnetic crystals of nickel oxide to femtosecond-fast laser pulses, and observed that domain walls could help couple different frequencies of normally non-interactive spin waves across different domains.

Coupling spin waves' constituent magnons could potentially help transfer data within an antiferromagnet, and facilitate ultrafast magnon-based computing with very limited energy dissipation.

From IEEE Spectrum
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