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Current issue

ELEKTRO 7/2018 was released on June 27th 2018. Its digital version will be available on July 27th 2018.

Topic: Cables, conductors and cable engineering; Tools, equipment and accessories for work with cables

Main Article
Parametrization of circuit models of Li-accumulators for electromobility
Smart Cities (part 3 – volume 1)

SVĚTLO (Light) 4/2018 was released on July 30th 2018. Its digital version will be available on August 31th 2018.

Refreshing our memory
Eccentric luminaires of René Roubíček from the years1965 till 1977
Bases of photometry – 1st part
Great personage of Czech science of times after Battle at Bílá hora: doctor, naturalist, philosopher and physicist Jan Marek Marci from Kronland

Optical radiation effects and use
The light and circadian rhythms

A new spintronics material promises huge leaps in computer data storage

11.05.2016 | Diamond Light Source | www.diamond.ac.uk

An international team of researchers have been using Diamond Light Source to examine what could be the future of computer storage. The action centres on a new device made from a novel antiferromagnetic material, which holds the promise of ultra-high density data storage.

It uses spintronics rather than electronics to store the data making it resistant to external magnetic fields, and external radiation, and it remains stable when the power is turned off. Furthermore, this all happens at room temperature in a material that is relatively easy to make. This is a combination of features that the data storage industry values very highly.

New spintronic material

We have known about and studied antiferromagnetic materials for decades, but they were not thought to have any potential as magnetic storage media. The reason is down to the way their magnetism is aligned on the atomic level. Each atom in a magnetic material has a property called “spin” which can be thought of as a tiny bar magnet, with a north and a south pole.

In ferromagnetic materials, the atomic spins are all lined up in the same direction, which is why they have a measurable magnetic field and act as large scale magnets. The regions in antiferromagnets are, by contrast, arranged head to toe. This means that the spins effectively cancel each other out and they have no external magnetic field.

A normal data bit is stored by using a current to flip the orientation of the spins. This is not possible with antiferromagnetic materials but Dr Peter Wadley and his colleagues have tackled the problem a different way; a spintronic approach that rotates pairs of spins rather than flipping them end over end.

Read more at Diamond Light Source

Image Credit: Adobe Stock

-jk-