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

https://www.lesswrong.com/posts/qjm8HR3uknHQ8sp9b/link-physcists-say-they-can-encode-magnetic-data-using-heat

http://​​www.physorg.com/​​news/​​2012-02-physicists-magnetic-breakthrough.html

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

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https://www.lesswrong.com/posts/qjm8HR3uknHQ8sp9b/link-physcists-say-they-can-encode-magnetic-data-using-heat?commentId=hmz3DR99ZgFkkB8e7

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

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    Normal_Anomaly
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  • omega_karma
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    2012-02-09T22:19
https://www.lesswrong.com/posts/qjm8HR3uknHQ8sp9b/link-physcists-say-they-can-encode-magnetic-data-using-heat?commentId=pzxt8yweLDEHBj8p3

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.

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    2012-02-11T15:45

Hard drives are obsolete.

https://www.lesswrong.com/posts/qjm8HR3uknHQ8sp9b/link-physcists-say-they-can-encode-magnetic-data-using-heat?commentId=vPEb9Dfbo9iHCSRh7

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.

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    2012-02-08T20:27
https://www.lesswrong.com/posts/qjm8HR3uknHQ8sp9b/link-physcists-say-they-can-encode-magnetic-data-using-heat?commentId=SB3Wea2gQZbF3pyex

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

Can you give an example?

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    kisM3S6X5erbqxnye
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    Thomas
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    2012-02-08T20:54

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.

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    shminux
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    2012-02-09T15:47

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.

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    2012-02-09T21:43

Or, if you prefer this one—Mechanism of surface magnetization by friction of ferromagnetic materials

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    2012-02-10T03:28

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

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    2012-02-09T20:42

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