A Magnetic Metal for Future Electronics ⚡ экспресс
The structural and electronic properties of the Heusler compound Co₂FeGe were investigated within density functional theory using the generalized gradient approximation (GGA) with the AKAI-KKR code. It was established that the material exhibits ferromagnetic ordering and metallic conductivity. Band structure analysis revealed that the magnetic moment is primarily formed by 3d states of cobalt and iron. The obtained data indicate the promise of Co₂FeGe for spintronic applications as a source of spin-polarized current.
Every electron in a conductor is like a spinning top: it moves and spins at the same time. In ordinary electronics, only the movement — electric current — matters. But the direction of spin carries an extra bit of information. Scientists have long sought materials where these microscopic tops can be controlled without loss. Computer modeling of the alloy Co2FeGe (cobalt, iron, germanium) showed that its electrons spin together in one direction. Such alignment reduces chaos in spin arrangement and yields a rare combination — magnetism with high conductivity. Moreover, it lets through only electrons with one spin direction, like a turnstile that sorts by clockwise rotation. This property paves the way for memory devices that barely heat up and work an order of magnitude faster. Verification of the prediction will rest on a computer analogue of spectroscopy — a method that "sees" spins by reflected light (like measuring the brightness of reflected light in a camera). All calculations relied on the standard quantum model.
🎯 The first Heusler alloy was discovered by accident in 1903: mixing copper, manganese, and aluminum — none of them magnetic — produced a material attracted to a magnet. It's as if mixing flour and water suddenly yielded a battery.