Articles tagged with Magnetic Fields
Scientists used NASA's Solar Dynamics Observatory to study a massive sunspot group and found that a magnetic cage prevented a coronal mass ejection (CME) from erupting. The model showed that the conflict between the magnetic rope and cage led to a powerful X-class flare instead.
A team led by Professor Pat Roche created the first high-resolution map of magnetic field lines in gas and dust swirling around a supermassive black hole at the centre of our Galaxy. The map shows intense infrared light and magnetic field lines within filaments of warm dust grains and hot gas, revealing their intricate relationship.
Researchers at Oregon State University found that newly-hatched salmon use the geomagnetic field to orient themselves vertically when emerging from gravel nests. This ability allows them to navigate three-dimensionally and orient themselves in their environment, which is crucial for survival.
The 'microscale magnetic tumbling robot' can traverse uneven surfaces and climb steep inclines in both dry and wet environments. Researchers developed the bot using standard photolithography techniques and explored its performance in fluid media to address unique challenges at the micro-scale.
Astrophysicists develop model to test hypothesis about supermassive black holes and their impact on galaxy jets. The study suggests that part of the jet's power comes from the rotating black hole, which loses angular momentum as it emits energy. By measuring magnetic fields in jets, scientists can estimate this rotational energy loss.
Researchers at Tohoku University successfully recreated conditions similar to those in space without an electric field-trapping boundary. The study shows the electron gas expands adiabatically when electric fields are removed, demonstrating the extension of classical thermodynamics to out-of-equilibrium systems.
Astrophysicists at UChicago used laser experiments to verify the turbulent dynamo theory, explaining the generation of cosmic magnetic fields. The study confirmed that turbulent plasma can amplify a weak magnetic field to strengths observed in stars and galaxies.
The Rice lab demonstrates energetic properties of colloids in spinning magnetic fields, gathering into disorganized aggregated clusters and then forming crystal-like regimes as the field strength increases. The researchers explore ways to model novel two-dimensional materials like tunable catalysts or colloids with changing surface areas.
Scientists identified a confining 'cage' in which a magnetic rope forms, causing solar eruptions. The resistance of this cage determines the power and type of flare. A new model predicts maximum energy release during solar flares, potentially devastating for Earth's systems.
Scientists analyzed data from HINODE to reveal a strongly magnetized iron atom signature in a sunspot, with a magnetic field strength of 6,250 gauss, more than double the usual amount. The strongest field was found at a bright region between two umbrae, not in the dark core as expected.
A team of scientists has solved a puzzle in astrochemistry by developing a way to measure magnetic fields in space using methanol. The new method, published in Nature Astronomy, gives astronomers a new tool to investigate how massive stars form.
Proton acceleration is hindered by magnetism, as electrons create a sheath field that accelerates protons at right-angles to the target. This effect, known as magnetic inhibition, progressively worsens at higher laser powers, reducing proton energies.
Researchers have resolved the ambiguity between Ampere's and Gilbert's forms of magnetic force, enabling characterization of particle spin dynamics in inhomogeneous electromagnetic fields. This advance can be applied to precision experiments, including those involving muons and neutrinos.
Researchers have demonstrated the potential for diamond as a material for spintronics, with strong spin-orbit coupling and tunable magnetic field control. Diamond's ease of processing and fabrication make it an attractive alternative to traditional semiconductor materials.
An international research team created an ultrathin electronic magnetic sensor that can be worn on skin, enabling a touchless manipulation of virtual and physical objects. The device uses magnetic fields to detect body motion and translate it into the virtual world.
A new study by UTSA professor Chris Packham and colleagues reveals weaker-than-expected magnetic fields around a black hole, contradicting previous models. The findings shed light on the complex relationship between black holes and galaxies, hinting at a deeper understanding of these cosmic phenomena.
A research team led by Tanya Prozorov has demonstrated the first high-resolution mapping of magnetic fields in bacterial cells and magnetic nano-objects in liquid. This capability has vast potential for scientific breakthroughs in physics, nanotechnology, biofuels conversion, biomedical engineering, catalysis, batteries, and pharmacology.
Researchers at Brown University developed a new technique that enhances NMR signal strength and versatility for studying nanomaterials and exotic states of matter. By using flat NMR coils, the team was able to optimize signal detection for various sample shapes and experiment types.
A Kaiser Permanente study found a significantly higher rate of miscarriage among pregnant women exposed to high levels of non-ionizing radiation from magnetic fields. The study, which measured exposure levels over 24 hours, reported a nearly three times higher relative risk for miscarriage.
Astronomers measured the magnetic field of a black hole in a binary system using data from a sudden flare. The field was found to be substantially weaker than expected, providing new insights into how black holes consume material.
A Russian scientist discovered how a polymer sample with magnetizable particles responds to external magnetic fields, revealing potential applications in various industries. The study found that the arrangement of particles affects the material's elastic properties, leading to significant changes under moderate magnetic fields.
Scientists have discovered black holes have significantly weaker magnetic fields than previously thought, with measurements about 400 times lower than estimated. This finding deepens our knowledge of how matter behaves under extreme conditions and could impact nuclear fusion power and GPS systems.
Researchers at the University of São Paulo and San Diego State University found that niobium boride does not exhibit superconductivity, contrary to traditional manuals. Instead, pure niobium filaments in the material are responsible for its high-temperature superconducting properties.
Researchers have demonstrated a new method to produce biotemplated nanoswimmers using bacterial flagella as templates, overcoming high startup costs of traditional approaches. The nanorobots can perform nearly as well as living bacteria and show potential for targeted cancer therapeutics and electronics applications.
Researchers found a strong inverse relation between magnetic field strength and star formation rate in molecular cloud complexes. This suggests that magnetic fields slow down or stop the collapse of gas clouds to form stars, leading to fewer massive stars in galaxy centers.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.