Spintronics: the future of electronic devices




In order to satisfy the desire for peace in the growth of computing power at ever decreasing cost of energy, the researchers decided to look at the field of spintronics (spin electronics), and develop a new generation of high-speed and ergonomic electronic devices.

New research teams of physicists at Nottingham University was published on August 20 2013 in the journal Nature Communications and reports the development of a new antiferromagnitngo spintronicheskogo material of manganese-copper-arsenic (CuMnAs), which would greatly help in advancing the field.

Dr. Peter Wadley, a researcher at the school of Physics and Astronomy said:

“We are a relatively unexplored field of applied physics, and our study provides a fresh perspective on the physical basis of the new field of spintronics antiferromagnetic. This material gives us the opportunity to create a new structure for the devices in the field of microelectronics by combining the functionality of spintronics and nanoelectronics at room temperature. ”

Where normal electronics relies on the figure of the electron charge, spintronics uses another fundamental feature of the electron, called spin. More about the back we wrote here .

In antiferromagnets, the electron spins in the neighboring atoms tend to cancel each other out. Therefore, they can play an active role in spintronic devices. Recent calculations and experiments have revealed a number of new physical phenomena associated with antiferromagnets, including the potential for memory and sensitivity. This new material with high quality crystal and is now compatible with current semiconductor is a promising candidate for the formation of a new sphere of antiferromagnetic spintronics.
Logic functionality and the ability to store

Most modern electronic devices based on conventional semiconductor technology is based on the presence or absence of electron charge carriers. On the other hand, many forms of memory – the same hard drive – use magnetism to store data.

Dr. Wadley said:

“For a long time, physicists and industry as a whole would like to combine these two properties – the functional logic semiconductors, and the possibility of accumulation in magnets – in one material. And this is part of the tasks of spintronics. In spintronics can not rely only on the presence or absence of charge, but also a fundamental property of the electron quantum called “spin.”

Traditionally, the team of Physics and Astronomy at Nottingham School achieved this by “doping” of conventional semiconductors, magnetic elements to produce dilute ferromagnetic semiconductors. In this area, was born a lot of interesting physical and functional discoveries, but she constantly suffered from many shortcomings. The difficulty lies in the transfer of technology business sector – working temperature is too low and the device to stop working at room temperature.
From ferromagnets to antiferromagnets

Nottingham team, in collaboration with the Prague Institute of Physics ASCR decided to approach the problem differently. Scientists are interested in materials that are not ferromagnetic and antiferromagnetic materials, another form of magnetic order. Antiferromagnetic materials are already used in modern electronics, but play a passive role. Recently devices have shown that they can be used as active component in electronic devices.

Dr. Wadley reports the following:

“Looking at the antiferromagnets as the active component of spintronic devices, systems opens up a new array of materials that should be explored, many of which have high critical temperatures. With CuMnAs we got to a very good system to study the new field of antiferromagnetic spintronics. ”

The new connection is grown from atomic layer by layer

The new compound is created layer by layer atoms of shows several favorable properties, including high temperature operation and compatibility with conventional semiconductor materials which are used in electronics crest. To install the magnetic properties of the new material at the atomic level have been carried out advanced experiments with neutron diffraction using the tool on WISH ISIS neutron factory, led by Dr. Dmitry Khalyavina and Professor Sean Langridge.

This is what marks the last:

“Implementation of the neutron diffraction layer, which is a thousand times thinner than a human hair, is quite a difficult task, but a tool WISH ISIS is well-equipped to deal with this issue. With WISH we were able to provide unique information is atomic-scale antiferromagnetic structure, which is important for the understanding of this wonderful material. ”

For the future of spin

Spintronics makes it possible to reduce energy consumption, and hence – to increase the density of the computing and storage. And since the antiferromagnetic not have a common magnetic field, spintronics antiferromagnetically means that the individual devices will not communicate with each other and in theory can be packaged together with a high density.

Well, if you want to see the world with spintronics, go ahead .
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