Phys.org April 8, 2024 An international team of researchers (Japan, Taiwan, Mexico, Australia) demonstrated the passive, diamagnetic levitation of a centimeter-sized massive oscillator, which was fabricated ensuring that the material, though highly diamagnetic, was an electrical insulator. By chemically coating a powder of microscopic graphite beads with silica and embedding the coated powder in high-vacuum compatible wax, they formed a centimeter-sized thin square plate which magnetically levitated over a checkerboard magnet array. The insulating coating reduced eddy damping by almost an order of magnitude compared to uncoated graphite with the same particle size. The plates exhibited a different equilibrium orientation […]
Tag Archives: Magnetic materials
Researchers aim to solve the rare earths crisis
Phys.org October 18, 2022 Researchers have been searching for new magnetic materials that can act as substitutes for the critically scarce components. Researchers at Northeastern University have patented a process to accelerate the creation of a rare earth magnet alternative using tetrataenite, whose magnetic properties make it a leading candidate to replace magnets made of the scarce material. To make the new magnet they altered the atomic structures of its iron and nickel components by arranging them into a crystal structure that resembles tetrataenite. Industrial permanent magnets are used to transfer energy from mechanical to electrical sources. The list of […]
A new arrangement: Using quantum dots to quench the smallest ferrimagnetism
Phys.org May 31, 2022 Researchers in Japan mathematically modeled the electron scattering Kondo effect in ferrimagnetic substances. They used a novel T-shaped lattice of four quantum-dots connected to two reservoirs of electrons to induce a current. While pairs of quantum-dots have been used to model quantum phenomena before, the T-shaped arrangement was new and allowed ferrimagnetism to emerge. Due to the symmetrical geometric configuration of the system, they expected to go from the minimal ferrimagnetic state to the Kondo state without going through other quantum entangled states, amplifying the electrical conductivity as usual. But it was suppressed, contrary to their […]
The changing paradigm of next-generation semiconductor memory development
Nanowerk January 12, 2021 It has been reported that spins are formed inside a nanomagnet if electric current is applied to the nanomagnet. There have been no studies on the physical results of these spins. Researchers in South Korea have established a theoretical system by developing a spin diffusion equation that describes the spin conductance in magnetic materials. They discovered that when the spins formed by electric current is emitted to the outside, only the sign is opposite to that of the spins injected from the outside, and the effects are the same. Therefore, the directions of the N pole […]