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howardbrandon11 t1_iyphfx7 wrote
>the researchers attempted to use a computer to identify a chemical compound that would produce a maximal magnetic field without the need for expensive, hard to acquire rare earth elements.
Perfect tl;dr.
theplushpairing t1_iypxus9 wrote
But did they succeed?
Tl;dr — yes, but it’s early days
PlutoDelic t1_iyqf4mq wrote
Can we put 'em on a fusion reactor?
Asking for 8billion friends, much needed.
Ecstatic_Carpet t1_iyr5zjk wrote
Fusion reactors need massive superconducting magnets, not cheap permanent magnets.
This work is better for reducing the environmental impact of the quickly growing EV market. Mining for rare earth metals is pretty destructive.
tonybenwhite t1_iyqmbi8 wrote
That’s pretty much what I expect out of every “scientists discover…” article posted on Reddit by default
catagris t1_iyqjarc wrote
I asked ChatGPT this question. This is what I got back
Can you help me identify a chemical compound that would produce a maximal magnetic field without the need for expensive, hard to acquire rare earth elements.
There are several chemical compounds that can produce a magnetic field without the need for rare earth elements. Some examples include iron oxide (Fe3O4), nickel oxide (NiO), and cobalt oxide (CoO). These compounds are not as strong as compounds that contain rare earth elements, but they are still capable of producing a significant magnetic field. Additionally, they are more readily available and less expensive than rare earth compounds.
catagris t1_iyqjcms wrote
Can you write a poem about it?
Sure, here's a short poem about a magnetic field:
A force unseen, yet strong and true
It guides and pulls, and makes things move
From iron filings to compass needles
The magnetic field is full of possibilities
It surrounds us, in earth and space
A fundamental force with a hidden face
But with the right tools and a curious mind
We can unlock its secrets, and learn to find
The power of magnetism, it cannot be denied
It shapes our world, and serves as a guide
From motors to generators, it provides the spark
The magnetic field, a force to marvel and embark.
debasing_the_coinage t1_iyr7x38 wrote
Basically, yes. The crucial figure of merit, though, is the magnetic energy product, usually given in megagauss-oersteds (MGOe), which sadly is missing from the abstract. This is the product of remanence, the field that remains in a material after being removed from a polarizing field (all permanent magnets have to be "initialized" by exposure to a strong field), and coercivity, which you explained.
Unfortunately, cobalt, while not a rare earth, is not really that much cheaper than neodymium (cf. battery woes). So the battle is still between L10-FeNi, Fe16N2, and MnAl, all of which are, unfortunately, very hard to produce from their constituent elements. The other material MnBi has been known for a while, but bismuth, like cobalt, is "not rare-earth but rare". A similar technique was used to discover Co3Mn2Ge:
https://www.sciencedirect.com/science/article/pii/S1359645421002937
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Schemati t1_iytfqa6 wrote
How does this compare to the phosphorus magnet they recently figured out how to synthesize based on a metal found in meteors
TurretLauncher OP t1_iyobx8v wrote
Abstract
Magnetic materials are essential for energy generation and information devices, and they play an important role in advanced technologies and green energy economies. Currently, the most widely used magnets contain rare earth (RE) elements. An outstanding challenge of notable scientific interest is the discovery and synthesis of novel magnetic materials without RE elements that meet the performance and cost goals for advanced electromagnetic devices.
Here, we report our discovery and synthesis of an RE-free magnetic compound, Fe3CoB2, through an efficient feedback framework by integrating machine learning (ML), an adaptive genetic algorithm, first-principles calculations, and experimental synthesis. Magnetic measurements show that Fe3CoB2 exhibits a high magnetic anisotropy (K1 = 1.2 MJ/m3) and saturation magnetic polarization (Js = 1.39 T), which is suitable for RE-free permanent-magnet applications.
Our ML-guided approach presents a promising paradigm for efficient materials design and discovery and can also be applied to the search for other functional materials.
[deleted] t1_iyoc2k2 wrote
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fubes2000 t1_iyooljq wrote
> The researchers thereby arrived quickly at the most promising compounds without analysing every single combination of the three elements. The researchers synthesised the most promising candidate, and found good agreement with their predictions. ‘I think this is the first demonstration of a rare-earth free magnet that does have high anisotropy,’ says Wang, ‘but the real magnet will be a lot more complicated than a single crystal, so this just opens the door and there’s a lot of work to be done.’
[deleted] t1_iyp29ie wrote
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[deleted] t1_iypm5hb wrote
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[deleted] t1_iyoc4hs wrote
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[deleted] t1_iyop5fi wrote
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RedditIsDogshit1 t1_iyrpu5w wrote
They made a prototype. Interesting. Great research I hope others can expand on even
[deleted] t1_iyt2jaw wrote
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koreanfertilityrate t1_iyoldl8 wrote
Ok I read the article so what is the new recipe?
[deleted] t1_iyonu9q wrote
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[deleted] t1_iyop6nk wrote
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MasterBinky t1_iypj2vo wrote
Why would they say it before they patent it.
habeus_coitus t1_iyotg66 wrote
I’m far removed from my materials science days and can only barely grasp what this article is saying. Here’s some layman’s definitions for those wishing to read the article:
coercivity - a measure of a material’s ability to withstand an external magnetic field without becoming demagnetized itself
permeability - in contrast to coercivity, it is a measure of how magnetized within an external magnetic field a material will become
anisotropy - from the greek “an” meaning “anti, not the same, without, not equal” and “tropikos” meaning “orientation, direction, to turn”. Essentially meaning that a material’s properties are not uniform/the same in all spatial directions. In context, likely referring to a material having much more pronounced magnetic fields within some orientations than others wrt their crystal lattice structure
genetic algorithm - a computational technique whereby multiple configurations are simulated, and a subset of the “best performing” configurations are sampled and then randomly tweaked to try and incrementally improve those configurations, the ultimate goal being to arrive at an optimal solution to a problem
So in full context, the researchers attempted to use a computer to identify a chemical compound that would produce a maximal magnetic field without the need for expensive, hard to acquire rare earth elements.