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shminux comments on [Link] Physcists say they can encode magnetic data using heat pulses - Less Wrong
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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.
Or, if you prefer this one - Mechanism of surface magnetization by friction of ferromagnetic materials
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?