Greater Data Storage in Smaller Chips Possible via Magnetic Vortices, say Researchers

Published By : 04 Mar 2015 | Published By : QYRESEARCH

A group of researchers at CNRS, Forschungszentrum Juelich (FZJ), and Helmholtz Zentrum Dresden Rossendorf (HZDR) have developed nanoscale components that apart from storing information in magnetic vortices enable reading these out very efficiently. With the help of this principle, the group has claimed that greater higher amount of data can easily be stored within memory chips that are smaller in size. This work carried out by the researchers is primarily based on the detection of the orientation. This orientation basically pertains to the magnetic vortices embedded within the nanodisks. And this task is conducted electrically. 

There are small and very thin disks that are placed within the nanodisks. These disks are made of ferromagnetic substances, which are known as electron spins. These electron spins create magnetic vortices. These spins create a certain magnetic movement of the electrons that are systematically arranged. This arrangement resembles simple bar magnets that are lined in a circular fashion.

The magnets contained in the core of these nanodisks are coordinated away from the disk’s surface/plane. Via these key properties which are the core’s magnetic orientation and the circulation pattern of the plane magnetization, the information and data gets stored efficiently. This also means that with the help of a single vortex, information and data to the tune of 2bit can be stored with much ease. About 4 memory bits can be stored in two vortices that are placed on one another. And this corresponds to 16 varied states. 

Such nanopillars with 150nm diameter and 50nm high stacked vortices make it tough to read the data/information. According to the researchers when direct current is supplied to the stacked vortices, alternating voltage waves gets emitted by the same. The determination of circulation sense of vortices and core polarity is done by the characteristic properties of microwaves. 
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