'Spin Memory' That Remembers Without Power

Principle of Nano Magnets That Change Spin Direction by Themselves Without External Spin
Applying Current
Expected to Accelerate Commercialization of Spin Memory Devices

[Asia Economy Reporter Junho Hwang] A theoretical foundation for developing next-generation spin memory devices that can retain information even when power is cut off and process information at high speed has been established by domestic researchers. This technology can reduce power consumption by up to 60% compared to existing spin devices.

Dr. Kyunghwan Kim of the Spin Convergence Research Group at the Korea Institute of Science and Technology announced on the 23rd that a new principle related to spin memory devices was proposed, and the related research paper was recently published in the international academic journal 'Physical Review Letters.'

Spin memory devices store information as 0 and 1 based on the direction of the N and S poles of very small nano magnets. Even if power is cut off, the direction of the N and S poles is maintained. However, there is a drawback that an external device must inject spins.

Dr. Kim's research team developed a spin diffusion equation describing spin conduction phenomena within magnetic materials, providing clues to overcome this drawback. The team confirmed that when spins formed by current diffuse outward, the spins injected externally have opposite signs but otherwise produce the same effect. This breaks the paradigm that external spin injection is necessary, allowing nano-sized magnets to control the direction of their N and S poles by themselves and be used as spin memory devices.

Based on this principle, the research team stated that constructing spin memory devices could reduce power consumption by up to 60% compared to devices that required external spin injection. In particular, since no structure is needed to inject external spins, memory can be developed with a simpler structure.

Dr. Kyunghwan Kim said, "This research provides an academic foundation for spin conduction phenomena within magnetic materials," adding, "It is expected to make a significant contribution to solving optimization issues such as power consumption and production yield, which have been the biggest obstacles to implementing next-generation spin devices through a new paradigm."

This content was produced with the assistance of AI translation services.