Articles tagged with Magnetic Fields
Research suggests that exoplanets near cool, low-mass stars require strong magnetic fields to shield their atmospheres from harmful X-rays and extreme pressure. The study models CMEs in a cool star system and finds that most CMEs are trapped by the star's surface, posing a significant threat to planetary habitability.
Researchers at NIST have made the most precise determination yet of Planck's constant, a fundamental value that will help redefine the kilogram. The new measurement has an uncertainty of just 13 parts per billion, exceeding international requirements for redefining the unit.
A team of scientists recreated turbulent magnetic field dynamics in a lab setting, mirroring the evolution of stars and plasma behavior. The study's findings have an uncanny resemblance to satellite data on the solar wind and magnetosheath.
A team led by Dr James Bryson deciphered magnetic messages in rare metal meteorites, confirming Psyche as an exposed planetary core. The findings suggest the asteroid cooled quickly due to its rocky mantle stripped away.
A computer simulation, taking a year to run, shows how spicules form on the sun's surface by incorporating neutral particles. The model suggests spicules play a key role in energizing the sun's atmosphere and generating Alfvén waves.
Researchers used ALMA to map the magnetic field surrounding a young protostar, finding it was surprisingly weak and wildly disorganized. This discovery suggests that the impact of magnetic fields on star formation is more complex than previously thought.
A new app is being developed to stop voice hacking using a smartphone's compass, which can detect magnetic fields and prevent replayed voices from being convincingly impersonated. The app aims to provide an additional layer of security for users and protect against growing digital security threats.
Researchers at Griffith University are developing highly sensitive nanoscale sensors to monitor strain, pressure, flow rate, magnetic field and temperature in harsh environments. The project aims to improve the safety and efficiency of oil and gas delivery systems in Australia.
Researchers in Singapore used computer simulations to study skyrmion particles, gaining insights into their internal behaviors. The study found that the three fundamental modes of skyrmions respond differently to external magnetic fields, potentially leading to new microwave nano-oscillators and ultra-compact devices.
A team led by NIST physicist Joseph A. Stroscio developed a magnetic switch that turns on and off a strange quantum property called the Berry phase. This phenomenon has observable consequences in various quantum systems, including electrons corralled in graphene.
A new simulation based on the von-Kármán-Sodium (VKS) dynamo experiment investigates the effects of fluid resistivity and turbulence on the collimation of the magnetic field. Researchers found that using magnetized ferromagnetic materials increases the magnetic field collimation, while conducting materials weaken it. This study contrib...
The MMS mission has discovered a hybrid motion exhibited by electrons in intermediate strength magnetic fields, characterized by spiraling and bouncing motions. This phenomenon plays a key role in magnetic reconnection, a process that can explosively release large amounts of stored magnetic energy.
A team of researchers has directly observed the magnetic field in the upper solar atmosphere for the first time using ultraviolet spectropolarimetry. The study reveals more complex structures in the chromosphere and transition region than expected, with polarization varying on a spatial scale of 10-20 arcseconds.
Researchers at University at Buffalo have discovered a new way to split energy levels between electron valleys in 2D semiconductors, increasing separation by a factor of 10. This could lead to more efficient computer chips and extend Moore's Law, predicting the end of transistor density increase
Researchers at Berkeley Lab have discovered a new atomically layered, thin magnet in a two-dimensional material, revealing intrinsic ferromagnetism and unprecedented control over ferromagnetic behavior. The discovery has major implications for nanoscale memory, spintronic devices, and magnetic sensors.
Researchers found that coronal jets and CMEs are triggered by magnetic reconnection, a process where stressed filaments break through their magnetic restraints. The study provides a theoretical universal model for solar eruptions, covering all scales from small jets to large CMEs.
A new study proposes a unified model for solar eruptions, suggesting that smaller events like coronal jets can be explained by the same process as massive coronal mass ejections. The breakout model, which was previously used to describe CMEs, has been adapted to explain the formation of jets.
New data from NASA's Cassini mission, combined with measurements from Voyager spacecraft and IBEX, suggests that the sun's magnetic field creates a rounded heliosphere, rather than a comet-shaped structure. The study reveals that the heliosphere is nearly symmetrical, which could impact how cosmic rays reach the inner solar system.
Scientists clarify relationship between ion mass and plasma performance improvement. Turbulence suppression through electron-ion collisions leads to increased confinement and particle heat management. Zonal flows play a crucial role in suppressing turbulence, grinding eddies and waves that improve plasma performance.
Researchers directly observed chiral currents in a 2-D integer quantum Hall system using an atomic quantum simulator. The team created a synthetic magnetic field and manipulated it to observe emergent behavior, showcasing the potential of this technique.
Researchers developed a new methodology to calculate theoretical spectra for atoms and molecules in strong magnetic fields exhibited by up to one-fifth of white dwarfs. This work sheds light on the presence of oxygen, silicon, phosphorous, carbon, and carbon-containing compounds in these collapsed stars.
Researchers at Helmholtz-Zentrum Berlin have developed a new switching process for non-volatile spintronics devices using asymmetric nanorings. The process involves applying a short magnetic field pulse, which leads to an intermediate 'onion state' and subsequently results in a stable opposite magnetization of the ring.
Rice University physicists are providing new insight into the quark-gluon plasma by smashing protons and lead nuclei at nearly the speed of light. They found evidence for the chiral magnetic effect, a characteristic magnetic property of QGP that arises from quantum mechanics.
NASA's MMS mission provides direct observation of kinetic Alfvén waves, revealing unexpected small-scale complexities and a higher rate of particle trapping than expected. The findings have implications for nuclear fusion technology and our understanding of the sun's solar wind.
A team of engineers has developed a technique to control soft robots using magnetic fields, enabling the creation of devices with complex functions and simple designs. The new method involves embedding iron microparticles in liquid polymer mixtures and applying magnetic fields to induce chain formation.
Researchers use new telescope images to reveal the emergence of small-scale magnetic fields in the corona, which may trigger solar flares. The study suggests that these magnetic field structures are linked to the onset of a main flare and could help predict flares with more precision.
Researchers discovered a way to transport biochemical substances using loop-shaped liquid crystal defects that form around twisted fibers, controlled by electric and magnetic fields. The defects can move alongside the fibers with translational motion when applied perpendicular to the fiber.
Scientists have discovered a phenomenon where solid metal bismuth retains structural motifs from its liquid predecessor, even when cooled back to solid. This effect, known as 'structural memory', is correlated with changes in magnetic properties and has potential applications in electrical engineering.
Physicists propose non-invasive probe to induce magnetic response in materials with weak or nonexistent fields. This technique could yield more sensitive MRI machines, high-speed storage memory, and efficient CPUs.
Scientists have identified a neutron star consuming material at an incredible rate, producing x-rays that exceed the Eddington limit by 1,000 times. The star's strong, multipolar magnetic field is believed to be responsible for its extreme properties.
A University of Maryland physicist has improved a method for designing stellarators, complex nuclear fusion experiments that aim to explore fusion's potential as an energy source. The new method, Regularized NESCOIL, balances tradeoffs between ideal magnetic field shapes and coil shapes, resulting in designs with more space between coils.
Researchers estimated the solar nebula's lifetime using ancient meteorites, finding it lasted around 3 to 4 million years. This discovery suggests gas giants Jupiter and Saturn formed within the first 4 million years of the solar system's formation.
The team estimated the solar nebula's lifetime using ancient meteorites that formed 4.653 billion years ago, suggesting it disappeared within the first 4 million years of the solar system's formation. The findings indicate that gas giants Jupiter and Saturn must have formed early in the solar system's history.
Scientists successfully demonstrate circularly polarized electroluminescence from spin-polarized LEDs at room temperature, without external magnetic fields. The discovery opens up new avenues for spintronics and potential applications in secure optical communications, cancer diagnosis, and optically enhanced nuclei imaging.
Researchers at Cambridge University developed a portable superconducting magnetic system that can attain a 3-tesla level for the magnetic field. Advances in cryogenics and new cooling technologies made this possible, enabling potential applications in small motors, healthcare, and other fields.
A PPPL physicist has discovered that motion in nearby magnetic fields can trigger magnetic reconnection, a process releasing energy when magnetic field lines snap together. This research may aid fusion reactions and better understand solar phenomena.
The BASE collaboration has set a new benchmark in measuring the antiproton's g-factor, a quantity characterizing its magnetic moment, with unprecedented precision. The result is consistent with the predictions of the Standard Model and indicates that protons and antiprotons appear to be mirror images of each other.
Researchers from Forschungszentrum Jülich and LMU Munich use angle-resolved photoemission spectroscopy to visualize band structure shifts in response to magnetic field changes. This observation confirms the predictions made by Einstein's theory of relativity, which suggests that electrons can sense the direction of a magnetic field.
Scientists studying lunar sonic booms hope to answer whether mini shock waves on the moon are being generated by protons in the solar wind colliding with pockets of magnetic fields. The findings come from NASA's ARTEMIS mission, which has gathered high-fidelity measurements of the shock waves.
The W7-X stellarator in Germany has produced high-quality magnetic fields consistent with its complex design, achieving an error rate of less than one part in 100,000. This finding could be a key step toward verifying the feasibility of stellarators as models for future fusion reactors.
Researchers developed a high-precision sensor to measure small variations in strong magnetic fields, enabling the detection of mechanical processes in the body. The technique has broad applications in medicine and biological research, including the development of new contrast agents for MRI.
The GREGOR solar telescope has demonstrated its potential with high precision measurements of magnetic fields and material motion. High spatial resolution imaging data have also provided unprecedented details of the Sun's photosphere, revealing features smaller than 100 km in sunspot light bridges.
Researchers from Brown University have demonstrated a method to put brakes on superconductivity by creating a random gauge field, disrupting the propagation of Cooper pairs and converting the material to an insulator.
Researchers have developed a novel liquid metal shower divertor system that can withstand extremely high heat loads and efficiently evacuate plasma as neutral gases. The new design features a fine jet stream of liquid metal, which forms a strong wall to block plasma and facilitate effective evacuation.
Researchers at PPPL and Princeton University proposed a groundbreaking solution to the mystery of fast magnetic reconnection. They developed a detailed theory for the mechanism leading to rapid reconnection, known as plasmoid instability, which breaks up plasma current sheets into small magnetic islands.
Researchers observe two X-ray pulsars transitioning to the propeller regime, providing valuable information about their magnetic fields and surrounding temperatures. The study reveals that giant outbursts are associated with the transition, offering a unique window into these intensely magnetized stars.
Scientists have detected the brightest FRB to date, providing a new understanding of the diffuse intergalactic material and its turbulence. By studying this phenomenon, researchers can gain insights into the production of cosmic magnetic fields.
Researchers used asteroseismology to determine the oblateness of a slowly rotating star, revealing a difference of only 3 kilometers between equatorial and polar radii. The star's small oblateness is surprising, as it rotates three times more slowly than the Sun.
Researchers create self-healing batteries, sensors and wearable circuits using a special magnetic ink. The devices can repair tears as wide as 3 millimeters in under 50 milliseconds.
The Alcator C-Mod tokamak achieved a record-breaking plasma pressure of 2.05 atmospheres, exceeding previous values by approximately 70 percent. This result validates the high-field approach to fusion energy, which could lead to smaller and cheaper fusion power plants.
Researchers have created a 'stability map' to track fusion plasma rotation and collisionality in real-time. This allows for the detection of potential instability and control over the plasma, potentially avoiding disruption of fusion reactions.
Researchers found that long-leg plasma exhaust channels can handle high power densities, exceeding material limits. The configuration promotes the build-up of high gas pressures in the legs, enabling a stable radiating layer to fully accommodate plasma heat exhaust.
Researchers at Sandia National Laboratories have demonstrated improved control over and understanding of implosions in a Z-pinch, enabling the creation of thermonuclear fusion-relevant densities and temperatures. The breakthrough was enabled by unforeseen physics that led to unprecedented implosion stability due to helical modes rather...
Researchers at TU Wien have developed a method to produce permanent magnets using a 3D printer, enabling precise customization of magnetic fields. The process involves depositing tiny magnetic particles into a polymer matrix, which is then exposed to a strong external magnetic field to create a permanent magnet.
Electron orbits are directly visualized in a high-magnetic field, showing a quantum fluid state with unique elliptical paths. The discovery could inspire new electronics technologies, particularly in valleytronics and two-dimensional materials.
Scientists have tracked a particular kind of solar wave as it swept upward from the sun's surface through its atmosphere, adding to our understanding of how solar material travels throughout the sun. The study provides a novel tool for scientists to study the atmosphere of the sun and sheds light on the coronal heating problem.
Scientists have found a way to significantly improve computer performance by using T-waves, or terahertz radiation, to reset memory cells. This process is several thousand times faster than magnetic-field-induced switching and could lead to ultrafast memory.
Researchers discovered that solar flares accelerate sunspot rotation speeds, revealing a complex relationship between the Sun's magnetic fields. This phenomenon challenges current theories on solar flares and has significant implications for understanding energy transport in eruptions.
Proxima Centauri, a small red dwarf star, has a regular cycle of starspots similar to our Sun. The study suggests that this cycle may impact the potential habitability of its planet, Proxima b.
Researchers at Helmholtz-Zentrum Berlin have discovered a new materials system that can create complex magnetic patterns, including monopoles and skyrmions, which could lead to faster and more efficient data storage. The system uses superconducting YBaCuO-dots covered with an extremely thin permalloy film.