Articles tagged with Magnetic Fields
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Astronomers at Queen's University Belfast have found that small and dense neutron stars with gigantic magnetic fields power the most luminous supernovae. Contrary to existing theories, these stars' findings suggest a new explanation for the brightest exploding stars in the universe.
Research finds giant magnetoresistance effect is sensitive to semiconductor device size, which affects electron scattering and resistance change under magnetic field application. High-quality semiconductors show larger changes in resistance with smaller devices.
A new study reveals that lightning strikes significantly control the evolution of mountain landscapes, especially summit areas, by blasting rocks and creating angular debris. This finding has vast implications for food security and water supply, particularly in southern Africa.
A new MRI technique has been developed with a spatial resolution of roughly 10 nanometers, significantly improving sensitivity. The team used a novel protocol and nanoscale metal constriction to overcome obstacles in applying classic pulsed magnetic resonance techniques.
A team of astronomers reports key observations that confirm a theory describing how dust grains in interstellar space align themselves in the presence of magnetic fields. The findings have significant implications for understanding interstellar medium and novel observational tactics to probe magnetic fields.
Astronomers have discovered a millisecond pulsar with a unique dual identity, shifting between X-ray and radio emission in a phenomenon never before observed. The discovery represents a long-sought intermediate phase in the life of these powerful objects, offering a rare opportunity to study a pulsar's magnetic field in action.
Astronomers are closer to understanding the formation of planetary nebulas after discovering a star in the southern sky with a strong magnetic field. The 'blooming' star is creating a jet of charged particles that glow with radio waves, and researchers believe the magnetic field may play a key role in shaping its symmetrical jets.
Researchers at the University of Leeds have cracked a centuries-old puzzle about the Earth's core by linking inner-core superrotation to outer-core behavior. The study reveals that the planet spins faster in one direction due to its geomagnetic field, generating eastward motion and westward drift.
Researchers have demonstrated a method to create polarization order from random fluctuations, enabling enhanced sensitivity in nanometer-scale magnetic resonance imaging (MRI) and potentially solid-state quantum computers. This achievement has the potential to revolutionize nano- and atomic-scale imaging techniques.
HZDR physicists offer new explanation for magnetic field-induced turbulences within 'dead zones,' enabling compact object formation. This breakthrough sheds light on the role of magnetic fields in planetary system formation.
Researchers at the University of Maryland say Voyager 1 has entered interstellar space, leaving a 'fuzzily-defined transition zone' behind. The spacecraft crossed the heliopause on July 27, 2012, but its exact location is still debated.
Astronomers have measured the magnetic field emanating from a swirling disk of material surrounding the black hole at the center of our Milky Way Galaxy. The measurement, made by observing a recently-discovered pulsar, is providing a powerful new tool for studying the mysterious region at the core of our home galaxy.
Scientists predict the sun's magnetic field will reverse in three to four months, affecting space weather and potentially cosmic rays. This change marks the midpoint of Solar Cycle 24, with half of 'solar max' behind and half yet to come.
Scientists have observed magnetic reconnection at the heart of solar flares and coronal mass ejections, which can affect satellites near Earth. The high-quality data from NASA's SDO and RHESSI spacecraft reveals a complex process involving charged particles, magnetic field lines, and plasma.
Researchers from UCL's Mullard Space Science Laboratory used data from the Japanese Hinode spacecraft to measure the Sun's magnetic field. The study found that the field is approximately ten times weaker than previously estimated.
Scientists at Twente University successfully created one-dimensional molecular wires with near-zero electrical conductivity when exposed to a weak magnetic field. The phenomenon is attributed to the Pauli exclusion principle and has potential applications in smartphone technology and hard disk read heads.
A new NASA-led study confirms the production of high-energy X-rays from gas spiraling into a black hole. The research models the complex motions and turbulent magnetic fields in the accretion disk, reproducing important features long observed in active black holes.
A team of interdisciplinary researchers from Johns Hopkins University has found that turbulence is the key to explaining magnetic field misbehavior in solar flares. The study used complex computer modeling to mimic what happens to magnetic fields when they encounter turbulence within a solar flare, revealing why the usual rule of physi...
Scientists have developed a mechanism to understand the cyclical nature of the Sun's magnetic activity, which is responsible for 'space weather' phenomena like solar flares and coronal mass ejections. This discovery provides a solution to mathematical equations governing fluids and electromagnetism for large astrophysical bodies.
Research teams at MagLab break through nearly 40-year barrier, observing a never-before-seen energy pattern in boron nitride and graphene materials. This breakthrough opens a new experimental direction in condensed matter physics and high magnetic field research.
New York University physicists have found that energy is released and dispersed in magnetic materials through a process akin to forest fires. By manipulating magnetic fields, they were able to control the speed of this process and understand how energy is sustained and spreads.
Researchers at Berkeley Lab have improved the performance of nanoscale magnetic field sensors using diamond defects, enabling clocks accurate to within a few quadrillionths of a second. The discovery may also enable rotational sensors quicker and more tolerant of extreme temperatures than current gyroscopes.
Physicists develop a guide to calculate energy level changes in atoms under optical tweezers' influence. Fictitious magnetic fields are shown to produce equivalent effects as real external fields.
Researchers at University of Delaware confirm presence of magnetic field generated by electrons, expanding potential for harnessing spin properties. The finding is significant for developing next-generation spintronic devices and controlling magnetization.
Researchers have discovered a new way to switch magnetism using short laser pulses, achieving speeds of quadrillionths of a second. This breakthrough potentially opens the door to faster memory and logic device speeds, exceeding current gigahertz limits.
The MAVEN magnetometer will study the planet's magnetic field to infer how the atmosphere evolved, helping answer why Mars became a frozen desert. By measuring sections of the planet's magnetic field, scientists can create a bigger picture of the overall atmosphere and understand its interactions with solar wind.
Researchers created a quantum sensor that detects the smallest vibrations in a carbon nanotube by measuring the effects of a magnetic spin on its mechanical motion. The device has potential applications in determining individual molecule masses and measuring magnetic forces.
On July 19, 2012, NASA's Solar Dynamics Observatory (SDO) detected a rare event: coronal rain. This phenomenon occurs when hot plasma in the sun's corona cools and condenses along strong magnetic fields. The SDO's footage shows the plasma as it slowly falls back to the solar surface, outlining the magnetic fields.
A giant sunspot formed on the sun's surface over Feb. 19-20, 2013, with rapid growth to six Earth diameters across in under 48 hours. The spot's delta region exhibited unstable magnetic fields, potentially leading to solar flares.
A research team at Caltech's Jet Propulsion Laboratory has found a way to effectively control erosion of Hall thruster walls by shaping the engine's magnetic field. By minimizing the effect of plasma on the magnetic field lines, they demonstrated 100 to 1,000 times less wall erosion when using magnetic shielding.
Researchers from Russia, Spain, Belgium, the U.K. and the U.S. Department of Energy's Argonne National Laboratory have discovered a way to efficiently stabilize tiny magnetic vortices that interfere with superconductivity. This breakthrough could remove one of the most significant roadblocks to advances in superconductor technology.
Researchers at ICFO developed a technique to scan individual cells using artificial atoms, which can detect weak magnetic fields generated by biological molecules. This breakthrough enables non-invasive diagnosis and better understanding of intracellular processes.
A study found that salmon use the geomagnetic field as a navigational aid, with changes in intensity correlating with their migration route. The results suggest that the fish imprint the magnetic field during their juvenile stage and use it as a proxy for geographic location when returning as adults.
Researchers propose a new hypothesis, the retention theory, to explain the ribbon's width, suggesting solar wind particles become trapped due to intense waves and vibrations in the magnetic field. This theory agrees with available observations and provides insight into how our heliosphere interacts with the universe.
Researchers propose that charged particles trapped in the region create the ribbon as they escape as neutral atoms, producing higher fluxes of ENAs and forming the bright ribbon seen by IBEX. The model shows good association with observed data, offering insights into the nearby galactic magnetic field and its strength.
Scientists have proposed a theory that explains the formation of a mysterious 'ribbon' of energy and particles at the edge of our solar system. The retention theory suggests that neutral hydrogen atoms from the solar wind become trapped by intense waves in the magnetic field, creating the ribbon.
A new study identified two neighboring areas of the cortex as processing different types of visual information independently. The researchers used magnetic fields to disrupt neural activity, revealing that one area plays a causal role in processing orientation, while another underpins shape recognition based on curvature differences.
Scientists observed a flux rope forming ahead of time in a coronal mass ejection (CME), providing a case study on its formation. The high-temperature plasma glow helped highlight the flux rope, which was then severed from the sun's surface, releasing billions of tons of solar material.
Researchers studied Pr0.5 Ca0.5 Mn0.975 Al0.025 O3 and found kinetic arrest band formation, inversely correlated with temperature extremes.
The Solar Coronal Imager (Hi-C) has provided a major piece of the solar corona puzzle by capturing images of magnetic reconnection. This complex process heats the corona to temperatures up to 7 million degrees F, powered by magnetic fields that constantly warp and collide in bursts of energy.
Scientists used Cluster data to study the spatial characteristics of turbulence in the solar wind, finding evidence of small 'current sheets' that dissipate magnetic energy into heat. These current sheets play a crucial role in the dissipation of turbulence, contributing to the overall heating of the solar wind.
Researchers have developed a novel application of spintronics that converts magnetic energy to electric voltage efficiently and directly. The device utilizes magnetic nanostructures and manipulates magnetization dynamics to generate alternating current (AC) voltages from direct current (DC) magnetic fields.
Astronomers have detected giant outflows of charged particles from the center of our galaxy, stretching across half the sky and emitting an enormous amount of energy. The outflows were found to be driven by star formation and are carrying strong magnetic fields that may play a key role in generating the galaxy's overall magnetic field.
Scientists have found elusive Dirac electrons in a unique material, paving the way for faster and more secure quantum computing. The discovery uses superconducting properties to create a new kind of qubit, potentially overcoming local noise problems in quantum computers.
NASA's Solar Dynamic Observatory captured two prominence eruptions on Nov 16, 2012, releasing plasma into space. The eruptions occurred between 1-5 a.m EST and did not appear to be Earth-directed.
Researchers created a device that tames the flow of photons using synthetic magnetism, breaking the time-reversal symmetry of light. This innovation enables precise control over photon trajectories, opening up novel ways to manipulate light for various applications.
Scientists at the University of Warwick and Tohoku University have directly imaged Landau Levels, showing concentric rings that increase according to energy level. The discovery uses scanning tunnelling spectroscopy to overcome material disorder, shedding light on the quantum Hall effect.
A team of MIT researchers has found a way to use oscillating microscopic beads to carry out biomedical tests, potentially enabling multiple medical tests on a tiny device. The technique allows for precise measurements of tiny quantities of materials and could lead to fast, compact, and versatile medical-testing devices.
Researchers employed a high-powered laser to dramatically enhance electron paramagnetic resonance (EPR) spectroscopy, allowing for the study of tiny molecules at high resolution. This breakthrough will facilitate discoveries in fields such as new drug development and efficient plastic solar cells.
A team of scientists corrected a fundamental rule in quantum mechanics by slowing down particles to extremely cold temperatures. They used the University of Florida's Microkelvin lab, which can reach temperatures near absolute zero, to observe and manipulate quantum systems.
A multi-university team has developed a powerful laser-powered electron paramagnetic resonance (EPR) spectrometer to study free radicals and nitrogen atoms in diamonds. This innovation allows for high-resolution analysis of tiny molecules, shedding light on their structure and behavior.
Researchers at Sandia National Laboratories have successfully conducted dry-run experiments on a key aspect of their MagLIF nuclear fusion concept. The experiments tested the durability of cylindrical beryllium liners under intense magnetic fields, with promising results that suggest the concept is moving closer to achieving scientific...
Researchers at Aalto University developed a device that merges MEG and MRI technology to produce unprecedented accuracy in locating brain electrical activity non-invasively. This innovation improves the diagnosis of cancer patients and enhances brain mapping for epilepsy cases.
Researchers have created an 'MRI' of the Sun's interior plasma motions, revealing that convective motions are approximately 100 times slower than previously projected. This challenges existing theories on heat transport and magnetic field generation, requiring a re-evaluation of sunspot formation and solar dynamics.
Astronomers have observed a young star, V1647 Orionis, exhibiting intense X-ray activity in the McNeil's Nebula, driven by strong magnetic fields. The star's rapid rotation is also evident in its X-ray emission patterns.
The Solar Ultraviolet Magnetograph Investigation (SUMI) mission aims to study the intricate magnetic fields in the sun's chromosphere, a hard-to-observe area of the sun's low atmosphere. By observing ultraviolet light, SUMI will create a three-dimensional magnetic map of the region.
Researchers identify plasma upflows traveling at 20 km per second, suggesting 'impulsive heating' as possible cause. The study provides new insights into understanding extreme space storms and their impact on satellite communications and power grids.
Researchers at NIST and University of Maryland successfully created graphene quantum dots by manipulating the strain in graphene drumheads. By controlling the tension on the drumhead, they mimicked magnetic fields and created semiconducting regions with a band gap, crucial for computing and other applications.
Researchers used NASA's Solar Dynamics Observatory and New Solar Telescope to observe ultrafine loops in the sun's corona. These narrow loops are connected to higher lying, wider loops and may help explain how temperatures rise throughout the corona.
University of Iowa professor Jack Scudder and colleagues have observed a milestone discovery in astrophysics: the first experimentally resolved site of collision in magnetic reconnection. This process links magnetic field lines from the sun to the Earth's core, allowing charged particles to cross previously forbidden boundaries.