[Link] Physcists say they can encode magnetic data using heat pulses

by MatthewBaker1 min read8th Feb 201210 comments


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Anyone have a strong opinion on this one? thanks :)

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Why is this important? More efficiency by scavenging waste heat?

I know approximately nothing about this, but the article claims that the physicists claim that it will allow for faster transfer of information to hard drives. I don't know what parts of the computer-using experience that would speed up though.

[-][anonymous]9y 0

Hard drives are obsolete.

From your link:

Until now it has been believed that in order to record one bit of information – by inverting the poles of a magnet – there was a need to apply an external magnetic field. The stronger the applied field, the faster the recording of a magnetic bit of information.

Technically that is not true. A rotation of a magnet applying some nonmagnetic force was always known as possible and an everyday matter. Still, this is a very good news.

A rotation of a magnet applying some nonmagnetic force was always known

Can you give an example?

A rotating magnet inside an electric generator, for example. It is not a magnetic force which changes the direction of the magnet many times every second.

That's silly, you are not changing its magnetization, only position. And you are certainly not flipping a single domain inside a magnet in this way.

That one is indeed interesting, as the magnetic domains are flipped/transferred, albeit not in a controlled way.

Then tear apart a magnet! You'll get two magnets. Would you say, that there is no re-magnetization?