/ en-us Â鶹ÒùÔº internet news portal provides the latest news on science including: Â鶹ÒùÔºics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Three distinct topological degrees of freedom are used to define all topological spin textures based on out-of-plane and in-plane spin configurations: the topological charge, representing the number of times the magnetization vector m wraps around the unit sphere; the vorticity, which quantifies the angular integration of the magnetic moment along the circumferential direction of a domain wall; and the helicity, defining the swirling direction of in-plane magnetization. /news/2024-12-tuning-skyrmion-helicity-racetrack-memory.html Condensed Matter Quantum Â鶹ÒùÔºics Wed, 11 Dec 2024 10:23:03 EST news653134981 Spintronics uses the spins of electrons to perform logic operations or store information. Ideally, spintronic devices could operate faster and more energy-efficiently than conventional semiconductor devices. However, it is still difficult to create and manipulate spin textures in materials. /news/2024-09-analysis-heterostructures-spintronics-desired-quantum.html Nanophysics Nanomaterials Fri, 20 Sep 2024 12:37:03 EDT news646054621 In a recent collaboration between the High Magnetic Field Center of the Hefei Institutes of Â鶹ÒùÔºical Science of Chinese Academy of Sciences, and the University of Science and Technology of China, researchers introduced the concept of the topological Kerr effect (TKE) by utilizing the low-temperature magnetic field microscopy system and magnetic force microscopy imaging system supported by the steady-state high magnetic field experimental facility. /news/2024-04-topological-kerr-effect-dimensional-quantum.html Condensed Matter Quantum Â鶹ÒùÔºics Mon, 29 Apr 2024 11:18:02 EDT news633608281 In the ever-evolving landscape of condensed matter physics, a recent breakthrough has emerged from the collaborative efforts of researchers at the Peter Grünberg Institute (PGI-1), École Polytechnique Fédérale de Lausanne, Paul Scherrer Institut in Switzerland, and the Jülich Centre for Neutron Science (JCNS). /news/2024-01-magnetic-superpowers-topological-magnons.html Condensed Matter Quantum Â鶹ÒùÔºics Mon, 15 Jan 2024 10:49:03 EST news624538142 Merons, topological structures based on in-plane magnetized magnetic materials, could have numerous valuable applications, particularly for carrying information or storing magnetic charge. Most past realizations of these structures, however, were limited in size and thermal stability or had impractical requirements, such as the application of external magnetic fields. /news/2023-07-millimeter-scale-meron-lattices-injectors.html Condensed Matter Mon, 31 Jul 2023 09:29:08 EDT news610014541 An international group of researchers has created a mixed magnon state in an organic hybrid perovskite material by utilizing the Dzyaloshinskii–Moriya-Interaction (DMI). The resulting material has potential for processing and storing quantum computing information. The work also expands the number of potential materials that can be used to create hybrid magnonic systems. The work appears in Nature Communications. /news/2023-04-dzyaloshinskiimoriya-interaction-magnon-magnon-coupling-hybrid-perovskites.html Condensed Matter Quantum Â鶹ÒùÔºics Tue, 04 Apr 2023 16:14:56 EDT news599843693 Ferromagnetic materials have a self-generating magnetic field, ferroelectric materials generate their own electrical field. Although electric and magnetic fields are related, physics tells us that they are very different classes of material. Now the discovery by University of Warwick-led scientists of a complex electrical 'vortex'-like pattern that mirrors its magnetic counterpart suggests that they could actually be two sides of the same coin. /news/2022-02-tiny-electrical-vortexes-bridge-gap.html Nanophysics Nanomaterials Wed, 09 Feb 2022 11:00:01 EST news563612452 When you think about how rapidly computers filled our homes, our cars and even ourselves through watches and earpieces, it might be hard to believe that there is a massive gap between computer's processing power and the speed, capacity and reliability of our brains. But, by 2040, it is predicted that this gap will pose a critical problem for energy consumption, because by one estimate all the energy produced in the world will be needed to meet the computational demands of our society. /news/2021-11-magnetic-symmetry-mirror.html Condensed Matter Wed, 17 Nov 2021 14:06:04 EST news556380359 'Topological defects' are formed when the symmetry of a magnetic material is disrupted. Domain walls (DWs) are a type of topological defect that separates regions of different magnetic orientations. A widely studied phenomenon, the manipulation of these defects has potential applications in high-performance memory storage devices, energy processing devices, and quantum computing. /news/2021-07-scientists-topological-defect-chiral-magnets.html Condensed Matter Quantum Â鶹ÒùÔºics Thu, 08 Jul 2021 13:24:09 EDT news544969222 Magnetic-spin interactions that allow spin-manipulation by electrical control allow potential applications in energy-efficient spintronic devices. /news/2021-06-tuning-interactions-layered-material-inserting.html Nanophysics Nanomaterials Wed, 16 Jun 2021 11:09:01 EDT news543060539 A joint research project of Johannes Gutenberg University Mainz (JGU), the University of Siegen, Forschungszentrum Jülich, and the Elettra Synchrotron Trieste has achieved a new milestone for the ultra-fast control of magnetism. The international team has been working on magnetization configurations that exhibit chiral twisting. Chirality is a symmetry breaking, which occurs, for example, in nature in molecules that are essential for life. Chirality is also referred to as handedness, since hands are an everyday example of two items that—arranged in a mirror-inverted manner—cannot be superimposed onto each other. Magnetization configurations with a fixed chirality are currently investigated intensively due to their fascinating properties such as enhanced stability and efficient manipulation by current. These magnetic textures thus promise applications in the field of ultrafast chiral spintronics, for example in ultrafast writing and controlling of chiral topological magnetic objects such as magnetic skyrmions, i.e., specially twisted magnetization configurations with exciting properties. /news/2020-12-ultrafast-dynamics-chiral-optical.html Optics & Photonics Wed, 09 Dec 2020 09:35:00 EST news526728897 As if they were bubbles expanding in a just-opened bottle of champagne, tiny circular regions of magnetism can be rapidly enlarged to provide a precise method of measuring the magnetic properties of nanoparticles. /news/2019-06-magnetic-fields-nanometer-scale-particles.html Nanophysics Tue, 11 Jun 2019 03:38:51 EDT news479443119 A new form of magnetic interaction which pushes a formerly two-dimensional phenomenon into the third dimension could open up a host of exciting new possibilities for data storage and advanced computing, scientists say. /news/2019-06-d-magnetic-interactions.html General Â鶹ÒùÔºics Tue, 04 Jun 2019 09:20:02 EDT news478858719 A quasiparticle is a disturbance or excitation (e.g. spin waves, bubbles, etc.) that behaves as a particle and could therefore be regarded as one. Long-range interactions between quasiparticles can give rise to a 'drag,' which affects the fundamental properties of many systems in condensed matter physics. /news/2019-03-chiral-exchange-chirality-oscillations-synthetic.html General Â鶹ÒùÔºics Thu, 28 Mar 2019 09:30:06 EDT news472980524 For many modern technical applications, such as superconducting wires for magnetic resonance imaging, engineers want as much as possible to get rid of electrical resistance and its accompanying production of heat. /news/2019-01-fast-tiny-magnetic-bits.html General Â鶹ÒùÔºics Fri, 04 Jan 2019 07:05:42 EST news465807917 In classical mechanics, particles are represented by point masses or rigid bodies, and in field theory by wave-like excitations or vibrations. Magnetic skyrmions are small, vortex-like spin textures of topological origin found in a variety of magnetic materials, and characterized by long lifetime. They were first discovered in 2009. In chiral magnets, skyrmions and skyrmion crystals (SkX) show unique physical properties due to their stability at ultralow current density. Explaining the stability of such particles is nontrivial; however, the particles can be described as topologically protected against small perturbations and decay. These properties can be advantageous for potential applications of skyrmions as information carriers in magnetic memories for storage and processing. Skyrmions are formed in magnetic systems via a variety of mechanisms, some of which work together. /news/2018-09-disordered-skyrmion-phase-stabilized-magnetic.html General Â鶹ÒùÔºics Thu, 27 Sep 2018 09:30:01 EDT news457251700 Researchers working at the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) coupled graphene, a monolayer form of carbon, with thin layers of magnetic materials like cobalt and nickel to produce exotic behavior in electrons that could be useful for next-generation computing applications. /news/2018-05-graphene-layered-magnetic-materials-ultrathin.html Nanophysics Tue, 29 May 2018 05:26:47 EDT news446790230 In a pioneering effort to control, measure and understand magnetism at the atomic level, researchers working at the National Institute of Standards and Technology (NIST) have discovered a new method for manipulating the nanoscale properties of magnetic materials. /news/2017-09-magnetism.html General Â鶹ÒùÔºics Fri, 15 Sep 2017 07:22:47 EDT news424678957 In recent years, excitement has swirled around a type of quasi-particle called a skyrmion that arises as a collective behavior of a group of electrons. Because they're stable, only a few nanometers in size, and need just small electric currents to transport them, skyrmions hold potential as the basis for ultra-compact and energy-efficient information storage and processing devices in the future. /news/2017-05-synchronized-skyrmion.html General Â鶹ÒùÔºics Tue, 30 May 2017 11:55:34 EDT news415364124 Post-doctoral researchers, Karim Essafi, Owen Benton and Ludovic Jaubert in the Theory of Quantum Matter Unit at the Okinawa Institute of Science and Technology Graduate University (OIST) are on a quest to find out as much as they can about unusual states of matter called spin liquids and if these spin liquids could generate advances in the field of physics. The results could lead to the development of quantum computing, which require an exploration of new materials to become a reality. /news/2016-03-quest-liquids.html General Â鶹ÒùÔºics Tue, 15 Mar 2016 09:02:04 EDT news377251316 Hard to unwind like knots in a rope, magnetic skyrmions are stable magnetic whirls that behave like tiny particles in magnetic thin films. These whirls, only a few nanometers in size offer great potential for next-generation information storage and processing. /news/2015-09-scientists-storage-based-skyrmions.html General Â鶹ÒùÔºics Wed, 16 Sep 2015 09:02:56 EDT news361612963 In research published in Nature Communications, researchers from the RIKEN Center for Emergent Matter Science in Japan, along with collaborators in Europe and Japan, have identified a class of materials that displays clear evidence for stable skyrmions at room temperature and above, paving the way for the development of useful spintronics devices. /news/2015-07-evidence-stable-room-temperature-skyrmions.html Condensed Matter Mon, 06 Jul 2015 08:20:02 EDT news355387775 In the field of magnetic materials, a rapidly expanding area of study concerns stable nanometer-scale spin arrangements. Spins are the fundamental magnetic entities in solids, and patterns made of several spins could be useful components in applications such as memory devices. Applied physicist Shinichiro Seki and his team in Japan, including members from the RIKEN Advanced Science Institute, Wako, now report the observation of one such spin pattern, called a ‘skyrmion’, in a material where it can be manipulated with electrical fields. This finding could help to make future devices based on spin structures more energy-efficient. /news/2012-08-magnetic-vortices-electric.html General Â鶹ÒùÔºics Fri, 17 Aug 2012 09:40:06 EDT news264412379 (Â鶹ÒùÔº) -- The phenomenon in ferromagnetic nanodisks of magnetic vortices – hurricanes of magnetism only a few atoms across – has generated intense interest in the high-tech community because of the potential application of these vortices in non-volatile Random Access Memory (RAM) data storage systems. New findings from scientists at the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well. /news/2012-08-phenomenon-nanodisk-magnetic-vortices.html Nanophysics Wed, 08 Aug 2012 05:45:20 EDT news263623498 Â鶹ÒùÔºicists at Forschungszentrum Jülich and the universities of Kiel and Hamburg are the first to discover a regular lattice of stable magnetic skyrmions – radial spiral structures made up of atomic-scale spins – on a surface instead of in bulk materials. Such tiny formations could one day form the basis of a new generation of smaller and more efficient data storage units in the field of information technology. /news/2011-07-discovery-magnetic.html General Â鶹ÒùÔºics Sun, 31 Jul 2011 13:00:01 EDT news231309480 Â鶹ÒùÔºicists from Research Centre Jülich and the University of Hamburg have discovered that on the atomic level nature differentiates between the image and mirror image of magnetic structures. /news/2007-05-supercomputer-nanolayers.html Nanophysics Thu, 10 May 2007 12:41:59 EDT news98019719