Hacker News with Generative AI: Magnetism

Electric power generation from Earth's rotation through its own magnetic field (arxiv.org)
Earth rotates through the axisymmetric part of its own magnetic field, but a simple proof shows that it is impossible to use this to generate electricity in a conductor rotating with this http URL, we previously identified implicit assumptions underlying this proof and showed theoretically that these could be violated and the proof circumvented.

Physics, Electricity, Magnetism, Earth Science

43 points by PaulHoule 27 days ago | 7 comments

Electric Propulsion Magnets Ready for Space Tests (ieee.org)
Nestled at the foot of a steep, forested hill, 16 kilometers outside Wellington, New Zealand, is a rather unassuming building; one among many on a research campus that was first established in the 1940s. From outside, there’s little to suggest that this is the birthplace of a remarkable piece of technology bound for the International Space Station (ISS) in the coming months.

Space Exploration, Magnetism, Technology

106 points by sohkamyung 61 days ago | 67 comments

Physicists Confirm the Existence of a Third Form of Magnetism (sciencealert.com)
An experiment in Sweden has demonstrated control over a novel kind of magnetism, giving scientists a new way to explore a phenomenon with huge potential to improve electronics – from memory storage to energy efficiency.

Physics, Magnetism, Science, Electronics

14 points by benkan 80 days ago | 1 comments

What's the Deal with Magnetic Fields? (lcamtuf.substack.com)
In a recent article, I brought up an important gotcha about electricity:

Physics, Magnetism, Electricity

30 points by zdw 81 days ago | 24 comments

Physicists have shown that an idealized form of magnetism is heatproof (quantamagazine.org)
Sunlight melts snowflakes. Fire turns logs into soot and smoke. A hot oven will make a magnet lose its pull. Physicists know from countless examples that if you crank the temperature high enough, structures and patterns break down.

Physics, Magnetism, Heat, Materials Science

93 points by headalgorithm 100 days ago | 14 comments

Physicists Magnetize a Material with Light (news.mit.edu)
MIT physicists have created a new and long-lasting magnetic state in a material, using only light.

Physics, Magnetism, Light

156 points by thunderbong 109 days ago | 70 comments

Tesla Cybertruck Becomes Extensively Corroded After Exposed to Magnet (torquenews.com)
Multiple Tesla Cybertruck owners share that their truck’s stainless steel has been rusted and corroded after exposure to a magnet. One owner specifically details the effects magnets have had on his Cybertruck’s stainless steel surface.

Tesla, Cybertruck, Corrosion, Magnetism, Automotive

27 points by peutetre 131 days ago | 24 comments

Researchers discover new third class of magnetism (nottingham.ac.uk)
A new class of magnetism called altermagnetism has been imaged for the first time in a new study. The findings could lead to the development of new magnetic memory devices with the potential to increase operation speeds of up to a thousand times.

Magnetism, Science, Materials Science, Nanotechnology

146 points by pavel_lishin 134 days ago | 55 comments

The anomalous state of Uranus's magnetosphere during the Voyager 2 flyby (nature.com)
The Voyager 2 flyby of Uranus in 1986 revealed an unusually oblique and off-centred magnetic field.

Space Exploration, Uranus, Magnetism, Planetary Science, Voyager 2

53 points by Hooke 165 days ago | 9 comments

Room temp chirality switching and detection in a helimagnetic MnAu2 thin film (nature.com)
Helimagnetic structures, in which the magnetic moments are spirally ordered, host an internal degree of freedom called chirality corresponding to the handedness of the helix.

Physics, Magnetism, Materials Science, Nanotechnology

46 points by westurner 185 days ago | 3 comments

The Solar Magnetic Field from Solar Minimum to Pole Flip (nasa.gov)
One advantage of long-lived missions like Solar Dynamics Observatory (SDO) is the ability to see slow but significant changes over long periods of time.

Space, Solar Physics, NASA, Sun, Magnetism

13 points by keepamovin 190 days ago | 5 comments

NASA Discovers a Long-Sought Global Electric Field on Earth (nasa.gov)

NASA, Earth Science, Electric Fields, Magnetism

64 points by signa11 240 days ago | 16 comments

What Materials Are Magnetic? (sciencenotes.org)

Science, Magnetism, Materials

75 points by rwmj 282 days ago | 42 comments

Circularly Polarized Light Unlocks Ultrafast Magnetic Storage and Spintronics (scitechdaily.com)

Magnetism, Optics, Storage, Spintronics

13 points by westurner 291 days ago | 1 comments

EV Motors Without Rare Earth Permanent Magnets (ieee.org)