Tag

Magnetism

All articles tagged with #magnetism

science19 days ago•6 min saved

Magnetic friction peaks without contact, defying Amontons' law

Researchers at the University of Konstanz demonstrate a completely contactless form of friction arising from the collective dynamics of magnetic moments between two layered magnets. By adjusting the gap between layers, they induce competing magnetic orders that cause repeated reorientation during motion, yielding a non-monotonic friction peak at intermediate distances. This dissipation occurs without wear or surface contact, challenging Amontons' law and suggesting tunable, wear-free friction for micro- and nano-scale devices and magnetic bearings.

via ScienceDaily|

#amontons-law #friction #magnetism

science21 days ago•6 min saved

Earliest Plate Movements Traced in 3.5-Billion-Year Rocks

By studying magnetism in 3.5-billion-year-old rocks from the Pilbara Craton, researchers traced rapid early plate movement—about 24 degrees of latitude in 30 million years and peak speeds near 47 cm/year—indicating an early, segmented lithosphere and challenging stagnant-lid theories about Earth's first tectonics.

via Indian Defence Review|

#ancient-rocks #early-earth #magnetism

science1 month ago•14 min saved

Moon's Hidden Magnetic Past Unearthed by Apollo Rocks

New analysis of ancient Moon rocks from the Apollo missions suggests the Moon had a stronger early magnetic field than previously thought, shedding light on the Moon's ancient interior and geophysical history.

via AP News|

#apollo-rocks #artemis #magnetism

science2 months ago•7 min saved

Laser flips magnetism in twisted 2D material, enabling light-defined circuits

Researchers demonstrated optical, non-thermal control of magnetism in a twisted bilayer MoTe2; a laser pulse reversibly flips the ferromagnetic polarity, with switching dynamics tied to whether electrons reside in a topological insulating or metallic state. This links topology and magnetism in a single platform and suggests future possibilities for light-written topological circuits and tiny interferometers on chips.

via SciTechDaily|

#laser #magnetism #moire-materials

science2 months ago•5 min saved

Hidden Magnetic Order Emerges at the Pseudogap Edge

Physicists used ultracold lithium atoms to simulate the Fermi-Hubbard model in an optical lattice and observed that magnetic correlations persist in a disordered-like regime near the pseudogap, following a single universal pattern tied to a temperature scale similar to the pseudogap temperature. They also detected extended magnetic polarons across many lattice sites, quantified a new 'polaron strength,' and measured high-order spin–charge correlations up to fifth order, indicating the pseudogap hosts complex, multi-particle quantum order that could connect magnetism to high-temperature superconductivity—though some model predictions diverged at higher doping.

via Indian Defence Review|

#magnetism #many-body-physics #pseudogap

science2 months ago•24 min saved

Ultracold-Atom Study Uncovers Hidden Magnetism in Pseudogap Phase

Physicists using an ultracold lithium-atom quantum simulator have revealed hidden magnetic order in the pseudogap phase of certain quantum materials, showing universal antiferromagnetic correlations above the superconducting transition and offering fresh insight into how high-temperature superconductivity may emerge, with results published in Proceedings of the National Academy of Sciences.

via Ground News|

#magnetism #pseudogap #quantum-simulation

science3 months ago•5 min saved

Scientists Develop Crystal That Twists Magnetism Into Exotic Swirls

Scientists at Florida State University have created a new crystalline material with complex swirling magnetic patterns called skyrmion-like spin textures, achieved by combining similar compounds with different crystal symmetries, which could advance data storage and quantum computing technologies.

via SciTechDaily|

#crystal-structure #magnetism #quantum-technology

science5 months ago•4 min saved

Physicists Reveal Inner Structure of Molecule Nucleus with Electron Probes

Physicists have for the first time observed how magnetism is distributed within a radioactive molecule's nucleus, specifically in radium monofluoride, using electrons as probes. This breakthrough allows for more precise studies of nuclear asymmetries that could reveal new physics beyond the Standard Model, and demonstrates the potential of molecules in fundamental physics research.

via Live Science|

#bohr-weisskopf-effect #magnetism #molecule

science5 months ago•3 min saved

Light-Induced Non-Reciprocal Magnetism Challenges Traditional Physics

Researchers from Japan have theoretically demonstrated that shining specific light on magnetic metals can induce non-reciprocal magnetic interactions that effectively violate Newton's third law, leading to a novel chiral phase with persistent rotation, opening new avenues in non-equilibrium materials science and potential technological applications.

via Phys.org|

#light-induced-phase-transition #magnetism #non-reciprocal-interactions

science6 months ago•2 min saved

1997 Experiment Causes Frog to Levitate

In 2000, a famous experiment by Dr. Andre Geim demonstrated how a frog could be levitated using diamagnetism, earning an Ig Nobel Prize; this phenomenon showcases how magnetic fields can make living organisms float without harm, with potential applications in research and industry, and hints at future possibilities like human levitation.

via IFLScience|

#diamagnetism #ig-nobel-prize #levitating-frog

science9 months ago•3 min saved

New Pathway for Electrical Switching of Altermagnetism

Researchers have demonstrated the electrical switching of altermagnetism in bilayer MnTe, a breakthrough that could lead to new, energy-efficient magnetic memory devices without the need for external magnetic fields, opening new avenues for data storage technology.

via Phys.org|

#altermagnetism #data-storage #electrical-switching

science10 months ago•7 min saved

Physicists Discover New Type of Magnetism

MIT physicists have observed a new form of magnetism called 'p-wave magnetism' in nickel iodide, characterized by spiral spin configurations that can be electrically switched, paving the way for more efficient spintronic memory devices.

via Phys.org|

#magnetism #mit #nickel-iodide

science10 months ago•6 min saved

Physicists Discover New Type of Magnetism

MIT physicists discovered a new form of magnetism called p-wave magnetism in nickel iodide, which allows for electrical control of electron spins and could lead to faster, more efficient spintronic memory devices, although current observations are at ultracold temperatures.

via MIT News|

#electron-spin-switching #magnetism #nickel-iodide

science10 months ago•8 min saved

MIT Finds Magnetic Superconductor in Pencil Lead

MIT scientists discovered a new type of magnetic superconductor in rhombohedral graphene layers of graphite, challenging the traditional view that superconductivity and magnetism are incompatible, with potential implications for quantum computing.

via SciTechDaily|

#graphene #magnetism #mit

space-exploration1 year ago•1 min saved

NASA Rover to Probe Moon's Mysterious Swirls

NASA is planning to send a rover in 2025 to investigate "lunar swirls," mysterious light-colored patterns on the moon's surface caused by magnetism. A new study suggests that underground magma cooling could create magnetic fields responsible for these swirls, but more data is needed to confirm this theory.

via MLive.com|

#lunar-swirls #magnetism #moon