Articles tagged with Magnetic Fields
The Max-Planck-Princeton Center has made significant progress in fusion research, investigating plasmas in astrophysics and advancing understanding of magnetic reconnection. New computer codes and experimentation have improved simulations, resolving long-standing questions about solar wind heating and magnetic field behavior.
Physicists at MIT and Princeton University have developed a new technique to map the energy and momentum of electrons beneath a material's surface. By using momentum and energy resolved tunneling spectroscopy, researchers can visualize the band structure of materials, which determines their electrical and optical properties.
Researchers at IST Austria have developed micrometer-scale, nonmagnetic devices that route microwave photons and shield qubits from harmful noise. The compact devices are a significant improvement over traditional predecessors and could revolutionize the development of quantum computers.
Scientists found that magnetic field strength increases linearly with distance from the specimen, making the double H-coil method more accurate for certain applications. The study suggests using the double H-coil method when data requires higher accuracy.
NASA has launched a fleet of missions to study the planets in our solar system, revealing unique features of each planet's magnetosphere. Earth's and other magnetospheres deflect charged particles away from the planet, but also trap energetic particles in radiation belts.
Research using ESA's XMM-Newton and NASA's Chandra X-ray observatories found that Jupiter's south pole X-ray emissions pulse every 11 minutes, while north pole emissions are erratic. This behavior is distinct from Earth's auroras, which mirror each other in activity.
Chinese researchers found that nano-diamond significantly enhances the performance of magnetorheological fluids (MRFs), increasing their shear yield strength and settling stability. The results show a high potential for MRFs to be highly enhanced through the process, with improved settling stability under different magnetic fields.
Researchers have discovered a new magnetic phase transition in a uranium-ruthenium crystal at extremely high magnetic fields. At around 21.6 Tesla, the magnetic moments of uranium atoms point alternatingly up-up-down in opposite directions, forming an uncompensated antiferromagnetic order.
The research found that Mars' magnetotail is unique, with a twist caused by magnetic reconnection between the solar wind and embedded surface fields. This process may also propel some of Mars' atmosphere into space.
The RIKEN-led BASE collaboration has measured the magnetic moment of the antiproton at unprecedented precision, finding it remarkably close to that of the proton. This result imposes strict limits on the possibility of CPT asymmetry, a key factor in the imbalance between matter and antimatter.
A new model reveals that neutral particles facilitate magnetic field penetration through the Sun's surface, producing spicules. This leads to the generation of Alfvén waves, which are thought to heat the sun's atmosphere and propel the solar wind.
Researchers used robotic telescope MASTER-IAC to observe gamma ray burst GRB160625B, revealing that a strong magnetic field controls the jets at first, then matter takes control. The study suggests that both factors play a basic role in the formation of black holes and gamma ray bursts.
Scientists have discovered a new type of rare molecules whose properties can be controlled by changing an external magnetic field. These paramagnetic molecules, part of the porphyrin class, are closely related to photosynthesis and respiration in living organisms.
Researchers at Columbia University have observed the even-denominator fractional quantum Hall state in bilayer graphene, surviving to much higher temperatures than previously thought. This discovery opens the door to new experimental tools and may finally solve the mystery of this phenomenon.
The study reveals that the anisotropic Qf value is caused by anisotropic electron conductivity and anisotropic bonding strength in the superstructure. The researchers achieved a five-fold increase in Qf parallel to the c-axis compared to perpendicular to it.
Researchers have developed a simple method to create more nitrogen-vacancy centers in diamonds, enhancing their sensing capabilities for magnetic fields. This breakthrough could lead to more compact devices and improved sensitivity, enabling the creation of unique quantum states.
Researchers at EPFL and University of Cambridge create device harnessing microscopic drum motion to convert signals between two circuits. The system enables dynamic reconfiguration of the isolator's direction, promising a new platform for building microwave devices without magnetic fields.
Researchers have reported a new type of quantum oscillation in graphene superlattices, observable at high temperature and on the mesoscale. This phenomenon sheds light on Hofstadter's butterfly and enables tuning of electronic materials properties.
Researchers at Caltech have developed a prototype miniature medical device that can diagnose and treat diseases by tracking its location in the body. The ATOMS devices, which borrow from MRI principles, contain integrated sensors and wireless transmission technology to mimic atomic resonance properties.
Researchers recreated complex cosmic simulations to investigate a possible transformation process where photons become axions and retransform into photons upon interacting with magnetic fields. This phenomenon may explain the observed brightness of distant celestial bodies.
Astronomers have measured large, well-ordered magnetic fields in a galaxy 4.6 billion light-years away, providing clues about how magnetic fields formed and evolved over cosmic time. The new observations offer insights into the structure of galactic-sized magnetic fields since the beginning of the universe.
PPPL physicists lead crucial experiments on Wendelstein 7-X, a magnetic confinement fusion experiment in Germany. The facility aims to create steady state plasmas and model a future power plant for limitless clean energy.
Scientists used a giant cosmic lens to study a star-forming galaxy nearly five billion light-years away, providing clues about the origin of galactic magnetic fields. The analysis revealed a large-scale, coherent magnetic field similar to those in nearby galaxies.
A NASA technologist is developing a self-calibrating hybrid space magnetometer that combines the precision of fluxgate and atomic magnetometers. The device will be ideal for CubeSat and small satellite missions, enabling simultaneous multi-point observations and studying Earth's ever-changing magnetic fields.
Researchers used supercomputers to create highly-detailed solar simulations, timed to the moment of the eclipse, which provided a preview of the solar corona's appearance. The simulations included improved treatments of energy transport and magnetic shear, increasing the accuracy of the predictions.
Researchers have discovered that mature Reed Warblers can detect the declination from magnetic north and use it to locate themselves longitudinally, orienting towards their migratory route. This system is believed to be learned by experience, as juvenile birds were unable to adapt to a new magnetic signal.
Researchers report finding similarities among classes of materials with phenomena like electronic symmetry breaking, which helps establish essential ingredients for novel functionalities. A new nematic-like state is observed in heavy-fermion superconductor CeRhIn5, correlating with unconventional superconductivity.
A solar filament rose from the surface of the Sun but collapsed due to invisible magnetic forces, preventing an eruption. Scientists used data from multiple NASA observatories and ground-based telescopes to track the event and develop a model that explains how the Sun's magnetic landscape terminates eruptions.
Researchers in India used numerical computations to investigate the role of chaotic magnetic field lines in generating intense electric current sheets, which are potential sites for extreme heating of the sun's corona. The simulations found a direct proportionality between the intensity of the current sheet and chaoticity.
Researchers from MIT and Rutgers University found evidence of an active lunar dynamo that generated a magnetic field lasting at least 1 billion years longer than previously thought. The study suggests two possible mechanisms that powered the moon's ancient core, shedding new light on the phenomena that produced the lunar dynamo.
Researchers at Poker Flat Research Range in Alaska used high-speed cameras to capture the rare phenomenon of an aurora flickering. The team discovered that faster flickerings occur at speeds of 1/60-1/50 and 1/80 seconds, revealing a complex exchange of energy between plasma waves and particles.
Scientists aim to understand how the moon got its 'tattoos' with a novel mission concept involving two connected CubeSats. The Bi-sat Observations of the Lunar Atmosphere above Swirls (BOLAS) mission could provide data on lunar hydrogen cycles and mechanisms for hydrogen implantation, shedding light on the formation of lunar swirls.
A study published in Scientific Reports shows that high-frequency alternating magnetic fields can be used to destroy bacteria encased in a slimy 'biofilm' growing on artificial joints. The treatment increased the effectiveness of antibiotic treatment, reducing the need for multiple surgeries and weeks of IV antibiotics.
Researchers developed microbot origami that can capture and transport single cells using magnetic energy. The system mimics nature and has potential applications in cell characterization tools and artificial muscles.
A team led by University of Maryland astronomers has constructed one of the most detailed descriptions of a gamma-ray burst to date, shedding light on the initial 'prompt' phase and the evolution of large jets of matter and energy. The data suggest that both magnetic fields and matter play key roles in shaping the jets.
A team of astronomers detected a massive star's titanic explosion and measured its development and decay in unprecedented detail. The findings provide strong evidence for one of two competing models for how gamma-ray bursts produce their energy, with the data showing powerful magnetic fields confining and directing the radiation.
Researchers found a localized glow near the cathode surface due to enhanced ionization and electron confinement in the magnetic field. Increasing the magnetic field strength revealed a transition from order to chaos via a period-doubling route.
Researchers have developed a novel method to propagate spin wave signals in multiple directions at the same frequency, without external magnetic field. This ultra-low power approach enables energy-efficient operation and paves the way for non-charge based information processing
Nebraska physicist Christian Binek discovered a formula that links magnetism to elasticity and temperature. This finding may enable engineers to design materials with tailored elasticity by manipulating magnetic properties or applying external fields.
A new study resolves the ongoing debate about the Sun's cyclic behavior by showing it follows the same pattern as other nearby solar-type stars. The research suggests that the Sun's magnetic cycle depends on its rotation rate and luminosity, advancing scientists' understanding of stellar magnetic fields.
A new sunspot group has emerged on the sun, with its dark core larger than Earth, in a video captured by NASA's Solar Dynamics Observatory between July 5-11, 2017. This is the first sunspot to appear after two days of solar spotlessness during the sun's regular 11-year cycle.
Scientists have successfully observed a spatial transition between two plasma states, where the magnetic field is stretched into space while maintaining thrust generation. This finding provides significant insights into overcoming the problem of detaching plasma from the MN in plasma thrusters.
Researchers studied the Sun using sound waves to find that its significant magnetic activity layer has grown thinner in recent years. This change is being investigated as a possible cause of unusual solar activity.
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.
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.
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 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 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.
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.