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New Scientist: The existence of a new kind of magnetism has been confirmed
(www.newscientist.com)
Can any of this be used for propulsion?
this post was submitted on 15 Feb 2024
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Is it the kind that ends when you drop a glass of water on it?
So if I understand correctly, both antiferromagnets and altermagnets can be packed together very tightly, unlike ferromagmets, which makes them potentionally better for use in computers. I didn't really get the advantage altermagnets have compared to antiferromagnets and why they're more suitable for spintronics. I'd appreciate if anyone could ELI5.
Imagine there are two balls, a red and a blue. You want to communicate to your friend rolling the only blue ball to them. In a ferromagnet there are only blue balls, in an antiferromagnet the blue and red balls are glued together and in an altermagnet there are both balls but they go in different directions so you just need to orient yourself correctly.
The antiferromagnet can't be used for spintronics, the ferromagnet can but big magnetic field disturb other parts in a circuit.
Thanks!
Sounds like Jojo part 7
ELIBD? (Explain Like I'm Brain Dead)
They're only magnetic on the inside!
Altermagnets are pretty interesting because their most defining feature is not the magnetic order in the materials. They look like ordinary antiferromagnets where the spins of adjacent atoms point in opposite direction and compensate each other, so no large magnetic fields are created. What differentiate altermagnets from antiferromagnets is how the electrons with different spin behave. When pulling current through altermagnets it will consist of purely spin up electrons along one crystal axis and purely spin down along orthogonal crystal axes. Thus the spin currents have a 'alternating' pattern, giving the name altermagnet. This is primarily exciting for the field of 'spintronics' which is all about creating technologies using spin currents.
Not all altermagnets are equally interesting, many antiferromagnets can be reclassified to altermagnets but they are generally insulating. (fun fact the first ever measured and textbook antiferromaget MnF2 is actually altermagnetic) So materials discovery of new altermagnets is important to find metallic, semi-metallic or even super conducting altermagnets.
Spintronics ... when real science sounds like made up science.
I made it to 'spins of adjacent atoms' and went cross-eyed
Hmm yes, I understand.
A four-year-old child could understand this! Run out and find me a four-year-old child. I can't make head nor tail out of it.
Magnet atoms magnet at magnet direction. Altermagnet magnet at 90° magnet direction. Antiferrous magnet magnet at 180° direction
(That's my takeaway at least)
Magnetism is real observable magic
We barely understand the kind we've already got. Now they're adding more?
This is a science community covering a world class discovery and every fuckdamn comment is a meme or joke.
Fuck this community, blocked along with every yahoo in the thread.
We could make a science_serious kind of sublemmy for that kind of discussion, that way the playground stays and a more strict version would exist!
Stay for the articles, but ignore the comments if you will
yeah welcome to Reddit
... I came here to avoid this kind of playground bs...
Sir, this is a Wendy’s.
No, it is another failed forum overtaken by children and right wing trolls.
You must be fun at parties
Existence is too serious to take it seriously.
They didn't even mention animal magnetism
I keep misreading things as anal magnetism.
Insane Clown Posse vindicated yet again
Altermagnets, how do they work???
Mother fucking happenstances