South Korea Ministry of Science and Technology Information and Communications released the news that the Korea National Institute of Science and Technology and Korea University R & D team successfully developed the next generation of high-speed magnetic domain wall memory core technology, the research published in the international academic journal “Nature”.

Ordinary hard disks store information by the rotation of the disk body, which has the disadvantage of high energy consumption and slow speed. The magnetic domain wall memory is a new concept storage element that operates by moving the magnetic domain walls in the magnetic nanowires and has the advantages of less volatility And low power consumption characteristics. However, due to its operating speed can only reach hundreds of M / S, in order to achieve commercialization needs to be developed to enable high speed of the core technology. Previously, the study of magnetic domain wall memory mostly used “strong magnet” material. Magnets generated inside “strong magnet” material were arranged in the same direction, and the Walker breakdown phenomenon (angular movement with magnetic material itself) was inevitable. This caused the operation speed Low important reason.

The team tested the ferromagnet “GdFeCo” (a metal alloy containing gadolinium, iron and cobalt) and found that the magnetization of gadolinium and FeCo in GdFeCo are arranged in anti-parallel states. When the two angular motions coincide at zero, Walker breakdown phenomenon disappears, and the moving speed of magnetic domain wall rises to 2km / s at room temperature. Adding this research result to magnetic domain wall memory is expected to produce next-generation high-speed memory of large scale, low power consumption and low volatility.