2026-10-19 04:55 UTC
Replies (6)
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@HonoraryMancunian@lemmy.world 2026-10-19 06:56
I didn’t even know there was a second form of magnetism
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@anakin78z@lemmy.world 2026-10-19 08:14
Here’s the bit that sort of explains things: “For more than 100 years, physicists generally divided collinear magnets into two fundamental categories: ferromagnets and antiferromagnets. Ferromagnets have an overall magnetic alignment that produces a net magnetization. These materials are essential to many magnetic memory technologies used today. In conventional antiferromagnets, opposing magnetic moments cancel one another, leaving no overall magnetization and producing electronic behavior very different from that of ferromagnets. Altermagnetism introduces a surprising third possibility. Like antiferromagnets, altermagnets have magnetic moments that cancel out, resulting in no net magnetization. However, their electrons can exhibit properties previously associated with ferromagnets. This unusual combination allows altermagnets to support electrical currents with strongly polarized electron spins while also displaying extremely rapid magnetic dynamics. Those characteristics could make them valuable for a new generation of spintronic devices, potentially advancing the speed and capabilities of future information technologies.”
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@LordCrom@lemmy.world 2026-10-20 00:51
I didn’t know there was more than 1. OK , this lack of knowledge must be rectified. Can someone suggest reading material for those of us without doctorates that can explain this please.
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@betanumerus@lemmy.ca 2026-10-20 13:25
Imagine a material made of groups of atoms, each group having an arrow. Ferromagnetism: If the material is in magnetic field, all arrows point along the magnetic field. Anti-ferromagnetism: If the material is in magnetic field, all arrows point against the magnetic Alter-ferromagnetism: If the material is in magnetic field, some arrow point along the external magnetic field and some arrows point against the external magnetic field.
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@TrackenDaKracken@lemmy.world 2026-10-20 13:57
This is why I’m skeptical whenever someone states definitively that the laws of physics prevents so-and-so. They are laws of man about physics, and men are both fallible and don’t know what they don’t know… until they know. “Humans will never travel faster than light because of this and this.” Well, okay, for now.
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@KeenFlame@feddit.nu 2026-10-19 16:39
Wow, this seems cool, but… can someone eli42 what a new magnetic “phase” means in this context? There’s phases in materials, electromagnetism, the atomic structure? More even? It seems that they refer to some definition of “magnetic phase” that I am unaware of? And why tf do we use that word for everything, can’t we call it something more practical?