Magnetic Nanoobjects

 


Researchers have recently proven that an entire bit’s sequences can be stored in cylinder domains.  A research team from Helmholtz- Zentrum Dresden Rossendorf (HZDR) Have proven that tiny cylinders can store bit sequences in an area approximately 100 nanometers wide. 

Reported in Electronic Materials, This research explores the different types of data storage and sensors, including magnetic variations of neural networks. 

“ A Cylindrical domain which we physicists also call a bubble domain,  Is a tiny cylindrical area in a tiny magnetic layer. When it spins, the electrons intrinsic angular movement in the material point in a different direction.  This creates a magnetization That differs from the rest of the environment. Imagine a small cylinder shaped magnetic bubble floating in the sea of opposite magnetization.” Reports professor Olav Hellwig from HZDR. 

The team is sure that these magnetic structures will be used in future spintronic Applications.

At the edges of the cylindrical domain, domain walls form. These are considered fringe areas where magnetization direction changes. The team is trying to control the spin structure of the domain wall. Clockwise or counterclockwise direction of the spin can be used to encode bits. 

There are other aspects of this project to consider.

“ our current hard disks, With their track width of 30 to 40 nm and a bit length of 15 to 20 nm accommodate approximately one terabyte on the Surface of a postage stamp. We are working to overcome this state of density limitation by extending storage into the third dimension.,” Hellwig states.

There are ways to control the internal spin structure of the main walls. These magnetic multiplayer structures can be standardized by joining different materials and layer thickness. Hellwig’s team Used cobalt and platinum, separated by ruthenium Deposited on silicone wafers. 

This meta-material is a synthetic anti- ferromagnet. It has special features, including a vertical magnetization structure, where each adjacent layer has opposite directions of magnetization. 

“ This is where the concept of the ‘racetrack’ memory comes in. The system is like a race track along which the bits are arranged like a string of pearls. The ingenious thing about our system is that we can specifically control the thickness of the layers and thus, their magnetic properties. This allows us to adapt the magnetic behavior of the synthetic anti-ferromagnet to Enable the storage, not only of individual bits, but entire bit sequences. This is in the form of a depth dependent magnetization direction of the domain walls” reports Hellwig. 

This is a new way to move multi bit cylinder domains along the massive data stream in a fast, controlled and efficient way. This research can also be used in magneto electronics ie, magneto resistive sensors or spintronics components.

 It’s claimed that these magnetic nano objects have great potential for magnetic implications in the future!!!! 

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