HOW SPINTRONICS WENT FROM THE LAB TO THE IPOD PDF

An electron can easily pass through a material whose electrons are similarly aligned, but will encounter resistance when it passes through one with electrons aligned in the opposite direction. The net effect was a rise in resistance that was much bigger than any seen before? This led to devices that are very sensitive to tiny magnetic fields. A hard disc drive stores bits on its surface as a pattern of magnetic fields.

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An electron can easily pass through a material whose electrons are similarly aligned, but will encounter resistance when it passes through one with electrons aligned in the opposite direction. The net effect was a rise in resistance that was much bigger than any seen before? This led to devices that are very sensitive to tiny magnetic fields. A hard disc drive stores bits on its surface as a pattern of magnetic fields.

Until the discovery of GMR, hard discs used metal induction coils to read out the data. But the laws of induction meant that the coils, and thus the bits, had to be quite large.

The discovery revolutionized consumer electronics. Storing information is not the only application, says Fert. Spintronics could soon lead to random-access memory that remains stable even without power, securing data and allowing some computers to start up more quickly, says Bart van Wees of Groningen University in the Netherlands.

It could also create new ways for fibre-optic systems and conventional semiconductors to talk to each other. Even further out is the possibility of processing information using spin, rather than electrical current. Although still highly speculative, Chappert says, such a computer could run faster and on much lower power than existing devices.

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Arashishicage How Spintronics Went from the Lab to the iPod A professor at the Institute of Solid State Research in the city of Juelich in western Germany, Gruenberg benefited financially from the GMR discovery by getting a patent before publishing his results in the scientific literature. My Star location Select Location. A professor at B. But smaller areas produce weaker rhe in magnetism, meaning the tell-tale changes in electrical resistance become too faint to be detected by conventional technology. By alternating ultra-thin layers of magnetic and non-magnetic material, Fert and Gruenberg produced giant magnetoresistance which greatly boosted this weak electrical signal.

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