Tag

Spintronics

All articles tagged with #spintronics

science-and-technology3 days ago•39 min saved

Magnetic Field Tuning of Exciton-Polariton Condensates in CrSBr Microwires

Researchers demonstrated that exciton-polariton condensates in chromium sulfide bromide (CrSBr) microwires can be magnetically tuned by up to 10.5 meV. By embedding few-nanometer CrSBr flakes in optical cavities, the team achieved polariton condensation in excited states, characterized by enhanced spatial and temporal coherence. The condensate energy shifts significantly under an external magnetic field of 2 T due to the reconfiguration of the material's spin order, transitioning from antiferromagnetic to ferromagnetic phases. This mechanism offers a new control knob for quantum light sources, distinct from traditional electric-field methods, and suggests potential applications in microwave-to-optical transduction and spintronic interfaces.

via Nature|

#condensed-matter #optics #quantum-physics

science5 days ago•28 min saved

Hidden Chiral Superlattice in UOTe Drives Record-Breaking Spintronics

Researchers led by Su-Yang Xu and Philip Kim at Harvard have demonstrated that the collinear antiferromagnet uranium oxytelluride (UOTe) hosts a spontaneous chiral superlattice. This structural feature, arising from frozen chiral phonons, generates large Berry curvature and spin-split bands. The study reports an anomalous Hall angle of 0.14 near the 150 K Néel temperature, among the largest recorded in bulk magnets, and confirms spin-polarized currents, offering a new route for antiferromagnetic spintronics.

via Nature|

#antiferromagnetism #quantum-physics #science

science11 days ago•4 min saved

UCF Team Confirms Altermagnetism in Layered Cobalt-Tantalum-Selenium Compound

Researchers at the University of Central Florida have provided the first experimental evidence of altermagnetism in a layered material called Co₁/₄TaSe₂. Published in Nature Communications, the study confirms that this compound combines the spin-splitting capabilities of ferromagnets with the lack of stray magnetic fields found in antiferromagnets. By using angle-resolved photoemission spectroscopy, the team demonstrated that the material’s electronic bands split based on electron spin direction, a key requirement for future spintronic devices. This discovery offers a new platform for developing energy-efficient electronics, ultrafast memory, and terahertz networks without the interference issues typical of conventional magnets.

via ScienceAlert|

#altermagnetism #nature-communications #quantum-materials

technology1 month ago•6 min saved

Optimal-control pulses could dramatically cut energy in magnetic memory

University of Edinburgh researchers use an optimal-control framework to design ultrafast magnetic-field pulses that switch magnetic states with far less energy than current memory technologies, potentially reducing energy use by orders of magnitude and moving memory devices closer to the Landauer limit; the approach includes practical guidance for device design and could extend to electrical currents or ultrafast lasers for future data storage.

via Science Daily|

#energy-efficiency #landauer-limit #magnetic-memory

spintronics2 months ago•49 min saved

Antiferromagnetic skyrmion lattice reveals incoherent scattering and coherent flow with quantified interactions

Time-resolved pump–probe X-ray microscopy tracks real-time, sublattice-resolved dynamics of a synthetic antiferromagnetic skyrmion lattice. The study reveals two regimes: a low-current incoherent regime where mobile skyrmions scatter off pinned ones and exhibit 3–20 ns recoil—used to extract a short-range exponential skyrmion–skyrmion repulsion with a*(≈44 nm), b*(≈247 nm)—and a high-current coherent viscous-flow regime with uniform lattice translation, negligible inertia, and suppressed skyrmion Hall effect. The results provide a quantitative framework for AFM skyrmion interactions and demonstrate gigahertz-speed, robust transport for dense spintronic devices.

via Nature|

#antiferromagnetic #skyrmion-skyrmion-interaction #skyrmions

technology4 months ago•2 min saved

Ultrafast, low-heat magnetic switch could redefine AI hardware

Researchers at the University of Tokyo unveiled a spintronic switch made from Mn3Sn antiferromagnet that can flip a binary state in about 40 picoseconds—up to 1,000× faster than the fastest AI accelerators and with far less heat and energy—offering a path to cooler, more efficient future hardware, though overall computing speed also depends on non-switching components and commercialization challenges.

via TechSpot|

#antiferromagnet #energy-efficiency #mn3sn

science5 months ago•11 min saved

Invisible magnet cancels its own field, paving the way for denser spintronic devices

DTU researchers engineered a compensated ferrimagnet built from chromium and pyrazine in a metal‑organic network that remains internally magnetized while almost entirely canceling its external magnetic field, even above room temperature. This could reduce stray fields that hinder dense electronics and enable closer integration of spin‑based devices, but the technology is still fundamental research and will require studies of electrical properties and thin‑film integration before real‑world use.

via Interesting Engineering|

#ferrimagnet #magnetism #molecular-materials

technology7 months ago•4 min saved

Triplet Superconductors Promise Ultra-Efficient Spin-Based Quantum Computing

NTNU researchers and collaborators report that NbRe may exhibit triplet superconductivity, enabling zero-resistance transport of both charge and spin and offering a potential breakthrough for energy-efficient, high-speed quantum computing, though further independent verification and tests are needed.

via SciTechDaily|

#nbre #quantum-computing #spintronics

science7 months ago•3 min saved

Triplet superconductors inch toward breakthrough for quantum tech

NTNU researchers report that the NbRe alloy may exhibit triplet superconductivity, a spin-carrying form that could enable zero-resistance spin currents and boost quantum computing. If independently verified, this would be a major advance for spintronics and quantum devices, though further tests are needed. The material also superconducts at about 7 Kelvin, a relatively high temperature for this field.

via ScienceDaily|

#nbre #quantum-computing #science

science8 months ago•5 min saved

Terahertz microscope unmasks quantum vibrations of superconducting electrons

MIT researchers developed a terahertz microscope that uses spintronic emitters and a Bragg mirror to compress terahertz light to micron-scale spots, enabling imaging of the collective terahertz oscillations of superconducting electrons in BSCCO at cryogenic temperatures and overcoming the diffraction limit—a breakthrough for studying quantum modes in materials with potential implications for room-temperature superconductivity and terahertz devices.

via MIT News|

#bscco #microscopy #science

science9 months ago•3 min saved

Revolutionary Magnetic State Promises Next-Gen Data Storage and AI Power

Researchers in Japan have demonstrated that thin films of ruthenium dioxide can exhibit altermagnetism, a new magnetic state that combines the advantages of ferromagnetism and antiferromagnetism, potentially leading to faster, denser, and more reliable data storage technologies. This discovery was achieved by controlling the crystallographic orientation of the material, confirming its intrinsic magnetic properties, and opening new avenues for spintronics and memory device development.

via Interesting Engineering|

#altermagnetism #data-storage #magnetic-materials

technology1 year ago•4 min saved

MIT Engineers Innovate Magnetic Transistor for Energy-Efficient Electronics

MIT researchers have developed a magnetic transistor using a magnetic semiconductor material, chromium sulfur bromide, which offers smaller, faster, and more energy-efficient circuits with built-in memory capabilities, overcoming limitations of silicon-based transistors and opening new avenues in electronics design.

via MIT News|

#2d-materials #energy-efficient-electronics #magnetic-transistor

science1 year ago•3 min saved

Harnessing Wrinkles and Defects in 2D Materials to Boost Spintronic Device Efficiency

Rice University scientists discovered that tiny wrinkles in atomically thin materials like molybdenum ditelluride can control electron spins with high precision, enabling the development of ultra-compact, energy-efficient spintronic devices by creating persistent spin helix states through mechanical bending and flexoelectric effects.

via Phys.org|

#2d-materials #persistent-spin-helix #science

science1 year ago•2 min saved

Scientists Develop Half Metal Conducting Single-Spin Electrons

Researchers at Forschungszentrum Jülich have created the world's first experimentally verified two-dimensional half metal, a material that conducts electricity using electrons of only one spin type, which could advance energy-efficient spintronic devices and operate effectively at room temperature.

via Phys.org|

#2d-material #electron-spin #forschungzentrum-julich

science1 year ago•4 min saved

Scientists Unlock Room-Temperature Quantum Circuits with Magnetic Graphene

Scientists at Delft University of Technology have experimentally demonstrated the quantum spin Hall effect in magnetic graphene at room temperature without external magnetic fields, paving the way for practical, miniaturized quantum and spintronic devices that operate under ambient conditions.

via The Debrief|

#graphene #quantum-physics #room-temperature