Articles tagged with Magnetic Fields
A small amount of iron adds 15-30% to the effective cooling capacity of a material, enabling improved near-room-temperature applications. The iron supplement eliminates hysteresis losses, allowing the material to perform at its peak potential.
Research suggests that filaments in the Galactic center are connected to areas of intense star formation, providing a link between thermal and non-thermal radio emission. The discovery sheds light on the phenomenon behind these striking features.
Astronomers searched for sun-like stars exhibiting Maunder minimums, but most are not like the sun. Nearly all stars identified as Maunder minima are actually much brighter and different from the sun.
Scientists at NCAR's High Altitude Observatory developed a new model that accounts for the evolution of sunspots caused by plasma circulation. The forecast predicts solar storms and cycle 24 starting around 2007-2008, with potential implications for understanding stars similar to the Sun.
Researchers at University of Illinois at Urbana-Champaign used strong magnetic fields to alter the electronic structure of carbon nanotubes, converting them from metallic to semiconducting and back. This phenomenon was made possible due to the Aharonov-Bohm effect, which is a fundamental aspect of quantum mechanics.
Scientists found that semiconducting nanotubes' band gap shrunk steadily under strong magnetic forces, confirming quantum mechanical theories and shedding new light on carbon nanotubes' unique electrical properties.
The study reveals that strong magnetic fields accelerate particles near the speed of light, radiating as gamma rays. The research suggests a new mechanism for gamma-ray burst formation, potentially resolving long-standing scientific debates.
Scientists have designed two-dimensional arrays of cadmium selenide nanoparticles, also known as quantum dots, to change their optical and light-emitting properties. These nanostructures can be used as waveguides or lasers.
Researchers at Lawrence Berkeley National Laboratory have developed a new MRI technique called remote detection, which separates NMR encoding and detection to optimize both. This separation enables orders-of-magnitude improvement in image resolution and manifold increases in sensitivity.
Physicists at JILA have observed a novel form of matter, a fermionic condensate, by cooling potassium atoms to extremely low temperatures and applying a magnetic field. The formation of these pairs has potential implications for high-temperature superconductivity and energy efficiency.
A team of astronomers studied the polarisation properties of GRB 030329's afterglow over 38 days, detecting significant variability in strength and orientation. The data reveal a unique diagnostic tool for gamma-ray burst studies, challenging existing theories.
The Harold Pender Award recognizes the contributions of Dennis Ritchie and Kenneth Thompson to the creation of the UNIX computer operating system, revolutionizing computing and paving the way for network-based computing. The award acknowledges their impact on society through their work on UNIX.
RHESSI observations show that microflares, tiny explosive events on the sun, provide a significant portion of heat in the corona. The satellite's findings suggest that microflares could be key to understanding solar flares and coronal mass ejections, which affect Earth's space weather.
Researchers from the University of Virginia measured microvascular diameters in response to static magnetic field exposure in skeletal muscle. The study found a restorative, biphasic effect on microvascular tone acting to normalize tone following exposure, with primary mediation by smaller resistance arterioles.
Researchers at UCSB and Pittsburgh have successfully controlled electron spins using electric fields, demonstrating a solid-state quantum logic gate that works with today's electronics. This breakthrough moves esoteric spin-based technologies closer to present-day possibilities.
Scientists have developed a new theory explaining the formation of large-scale magnetic fields in galaxies, which twist and expand like elastic ribbons. The theory resolves a long-standing problem in astrophysics by showing how turbulence creates opposing small-scale fields that eventually suppress growth.
Astronomers have identified a new type of star in a compact binary system, exhibiting properties similar to brown dwarf stars. The discovery sheds light on the formation and evolution of extra-solar planets, which are often found close to their host stars.
Scientists propose that a massive thermal burp could have briefly insulated the moon's core, allowing it to cool quickly and produce a magnetic field. This theory also explains the uneven distribution of metal-rich volcanic rock on the moon's surface.
Scientists created a new material that exhibits fractal behavior in its magnetic field, leading to the discovery of 'fractal cluster glass'. This phenomenon could revolutionize the design of electronic devices in the future, as smaller devices may no longer behave like traditional three-dimensional objects.
Researchers have obtained near-infrared images of the hot spots in radio galaxy 3C 445 using advanced instruments on the VLT ANTU telescope. The images show synchrotron emission associated with an intergalactic shock, providing evidence of cosmic accelerators far from the galaxy and its main jets.
Researchers at Swarthmore Spheromak Experiment (SSX) make 1st 3D measurements of magnetic reconnection, revealing a swept and sheared magnetic structure. This breakthrough helps understand plasma physics processes on the sun and new structures in fusion energy machines.
Scientists at the Rutherford Appleton Laboratory have successfully generated intense magnetic fields in a dense plasma using high-powered laser pulses. The resulting fields reached up to 400 MegaGauss and may soon be intensified further, enabling researchers to test models of extreme astrophysical conditions.
New devices can control the motion of magnetic flux quanta, allowing for precise manipulation of magnetic fields within superconducting materials. This enables the creation of specific magnetic profiles, facilitating applications such as removing unwanted flux and magnetically focusing nearby particles.
New theory explains why circumstellar Keplerian disks are stable around Be stars, contradicting previous model's predictions. The Magnetically Torqued Disk model suggests a narrow range of star types can form detectable disks.
Researchers will study ultra high field magnetic resonance imaging (MRI) to develop clearer, more precise images of the body's interior. The goal is to improve diagnosis and treatment for patients.
Researchers discover helicity, a twisted structure within the Sun's magnetic field, causing coronal mass ejections (CMEs) that can affect modern technology and the northern lights. Understanding CMEs is crucial for predicting space weather.
The NASA Living With a Star program aims to understand the dynamics of the Earth-Sun system. The Stanford-led SDO mission will study the Sun's magnetic fields, creating 3D images of solar magnetic regions and surface fields, to predict destructive flares and solar storms.
These sensors can detect temperature changes, stress, viscosity, liquid density, and surface tension without wires or connectors. They use magnetoelastic thin-film technology to generate harmonics that change as the environment around them alters.
Researchers at UB have developed an ultrasmall magnetic sensor that produces a record change in resistance in an ultra-small magnetic field, exceeding all previous records. The sensor's capabilities could enable the storage of 50 or more DVDs on a hard drive the size of a credit card.
Researchers at Stanford University have discovered that giant loops of hot, electrified gas linked to sunspots near the equator may cause polar reversals. The findings help predict violent solar flares and eruptions that interfere with Earth's communications.
Researchers may use a super-fast laser pulse to observe and control nuclear reactions, potentially slowing or accelerating fission. The lasetron concept could also briefly produce massive magnetic fields, opening new experiments in astrophysics.
Researchers at Virginia Tech are developing 'bursting' polymer molecules that can change their architecture in response to stimuli, offering potential solutions for drug delivery and novel wound dressings. The breakthroughs are driven by responsive groups on the ends of the polymer chain.
Researchers found enormous cosmic bubbles, dubbed 'ghost cavities,' containing faint radio emissions that may hold magnetic fields. These bubbles could be crucial in creating new stars and shaping galaxy cluster structure.
A six-person research team, led by physicist David Awschalom, demonstrates continuous electrical tunability of spin coherence in semiconductor nanostructures. This breakthrough enables the creation of spin gates that can manipulate electron spin direction and speed.
A team of researchers using the XMM Newton satellite detected X-ray emissions from a supermassive black hole, indicating it is spinning and emitting energy through a complex magnetic field system. This discovery provides new insights into the behavior of supermassive black holes and their role in galaxy formation.
Researchers discovered that baby sea turtles can detect regional magnetic fields and respond with directed movements to stay on course. The turtles' navigational system allows them to migrate across the 8,000-mile Atlantic Ocean and back using the Earth's magnetic field as a guide.
Researchers at Northwestern University have developed a new imaging method that uses high-temperature superconductors to improve Magnetic Resonance Imaging (MRI) technologies. The breakthrough, led by Professor William Halperin, enables the study of superconducting vortices in tiny crystals with unprecedented spatial resolution.
Researchers discover a new form of matter, called BEC, which can collapse and explode when cooled to near absolute zero. The new phenomenon, dubbed a Bosenova, involves the sudden transition from repulsive to attractive interactions between atoms.
Researchers developed a new 'ex situ' method to recover high-resolution NMR spectroscopy data from samples in nonuniform fields. This breakthrough extends the use of NMR as an analytical tool, enabling studies on previously inaccessible samples.
Researchers unveil a new model suggesting magnetic dynamo forces shape planetary nebulae by twisting radiating material into distinctive shapes. The discovery sheds light on the cosmic 'paintbrush' responsible for creating stunning nebulae, with implications extending beyond our solar system.
Researchers at U-M and Norway have found a way to reconcile paleomagnetic data with the classical Pangea A model. The key lies in assumptions about Earth's magnetic field, which revealed long-term non-dipole fields that produce a near-perfect continental fit.
A new map of Mars' ionosphere reveals strong localized magnetic fields as a significant barrier to atmospheric erosion by the solar wind. The findings suggest that these crustal fields played an important role in the past evolution of Mars' atmosphere and could have protected it from being stripped away.
Scientists analyzed the magnetic field of the ALH84001 Martian meteorite using a new microscope, revealing that its interior remained cool enough to support life. The findings suggest that microbial life may have traveled from Mars to Earth via the meteorite, but do not prove it.
Researchers observed a bright X-ray flare from a brown dwarf, LP 944-20, which lasted nearly two hours and had an energy comparable to small solar flares. The flare's origin is believed to be in twisted magnetic fields beneath the surface of the brown dwarf, providing strong hints about the existence of turbulent magnetized hot material.
Researchers have directly observed magnetic field line shrinkage or reconnection outflow during solar flares, resolving a long-standing mystery. The discovery sheds light on the behavior of magnetic fields in solar flares and their impact on space weather.
Researchers propose two theories to explain the origin of neutron star kicks: the 'mass rocket,' which suggests a mass ejection asymmetry, and the 'neutrino rocket,' which relies on the intense magnetic field surrounding the newly formed neutron star. These theories aim to explain the observed high speeds of pulsars and the asymmetrica...
Scientists find that cryptochrome, a blue-light photoreceptor, may play a role in processing visual clues from the magnetic field and staying on course. The discovery was made using chemical experiments and computational modeling.
Scientists at PPPL have achieved a significant breakthrough in fusion research, producing the highest plasma current ever recorded in a spherical torus device - 1 million amperes. This milestone is crucial for understanding the physics of fusion and potentially leading to more efficient development paths for fusion energy.
Researchers discuss alternative theories for Magnetar outbursts, including the role of intense magnetic fields and environmental influences. The magnetar theory suggests that giant flare events occur when the neutron crust cracks, while an alternative explanation proposes a relativistic wind of interstellar material surrounding the SGR.
Astronomers believe that megaflares produced by tangled magnetic fields on a star and its planet might help identify distant Sun-like stars with planetary systems. This phenomenon could provide energy for the development of life on rocky planets, making it a promising area to search for extraterrestrial life.
Researchers at Case Western Reserve University have developed a new method of supershielding, allowing magnetic fields to be completely contained without using traditional shielding methods. This invention has the potential to protect modern technologies from interference and destruction.
The 'braking glitch' in the spin rate of a soft gamma repeater (SGR) suggests a massive starquake may have occurred. The SGR's rotational period increased steadily until a rapid decrease was observed, indicating a massive energy release.
Researchers at the University of Toronto found a strong association between magnetic field exposures in residences and the risk of developing childhood leukemia. Children exposed to higher levels of magnetic fields were two to four times more likely to develop leukemia, with risks highest for those diagnosed before age six.
Researchers at Cornell University have developed nanomagnets that can store data, with the potential to gather up to 100 times more information in the same space as present-day magnetic data disks. The devices are tiny bar magnets as small as 25 nanometers long and require new physics to make a system work.
New radio observations reveal that black holes in galaxies can be fed with gas, while the surrounding material remains intact. In NGC1097, a barred galaxy with a massive central black hole, researchers found that gas flows towards the black hole through a shock front, which is then redirected along the bar by magnetic fields.
Research at Cambridge and Oxford universities is using magnetic forces to levitate, stir and dam molten metal, reducing pollution and increasing efficiency. New devices are producing high-quality sheet metal with reduced edges and improved aluminum smelting costs.
Researchers have found a small gap in the auroral oval, which appears about 7% of the time between 10pm and midnight. The discovery was made using data from the Ultraviolet Imager aboard the Polar spacecraft and suggests that changes in the interplanetary magnetic field may be responsible.
JASMIN will measure magnetic field direction and strength from space, resolving details of the Sun's magnetism nearly 20 times better than ground-based telescopes. The instrument aims to unravel mysteries of the Sun's corona heating, heat waves and solar flares, with potential implications for Earth's climate.
Researchers found 'anomalous X-ray pulsars' in supernovae remnants, which spin slower and have stronger magnetic fields than radio pulsars. This discovery reverses the understanding of how pulsars behave after a star explodes as a supernova.
Astronomers detect powerful gamma rays from SGR 1900+14, confirming the existence of magnetars and linking three mysteries: what are Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs)? The discovery provides insights into neutron star behavior and suggests a million old magnetars might be drifting through the Galaxy