Articles tagged with Magnetic Fields
Researchers have developed sperm-inspired microrobots that can be controlled by oscillating weak magnetic fields, enabling applications such as targeted drug delivery and in vitro fertilization. The robots consist of a head coated in a thick cobalt-nickel layer and an uncoated tail, propelled forward by magnetic torque.
A team of researchers has successfully replicated the amplification of cosmic magnetic fields in a laboratory experiment, using supercomputer simulations and high-powered laser beams. The findings provide insight into the origins of magnetic fields in interstellar space.
Researchers used high-powered lasers to create table-top supernovae, recreating the explosive events that occur when stars reignite or collapse. The experiments revealed irregular 'knotty' features and intense radio and X-ray emissions, confirming a theory about the interaction between magnetic fields and interstellar material.
University of Leicester researchers captured stunning images of Saturn's auroras, providing evidence for the theory that Saturn's magnetic tail collapse causes auroral displays. The findings support a similar process on Earth.
Researchers found that the magnetic field of a neutron star takes on a stable structure and evolution slows down, challenging previous theoretical models. The discovery could help scientists measure neutron star properties and gain insights into matter at extreme densities.
A team of researchers has discovered that the afterglow from a gamma-ray burst behaves differently than expected, with 10,000 times more circularly polarised light detected. The findings provide new insights into the extreme properties of matter under shockwave conditions.
A team of physicists has identified a universal law governing the magnetic properties of metamagnets, which could lead to more efficient refrigerators, heat pumps, and airport scanners. The non-linear property enables cycling of magnetism on and off, allowing for efficient cooling and pumping of heat.
Researchers have developed an analytical approximation to study SQUID dynamics, enabling faster computation and evaluation of sensitivity in magnetometers. The technique, used for low-noise amplifiers and antennas, reduces simulation time to practically zero.
A recent study by North Carolina State University reveals that impurities can either hinder or improve the performance of a key superconductive material, Bi2212. The size of the impurities determines their effect, with nanoscale defects appearing to enhance superconductivity, while large-scale impurities weaken it.
Researchers use NASA's SDO to map dynamic magnetic fields and brightpoints in the sun's atmosphere, revealing deep-seated activity and potential cells of flowing material. This breakthrough offers near real-time mapping of the sun's interior, affecting solar flares and other events.
Researchers at KAIST developed a new system for wireless power transfer with an extended range of up to 5 meters, making it possible to charge multiple devices simultaneously. The system uses a compact and scalable design with a low Q factor, achieving higher efficiency and reliability compared to previous technologies.
A team of scientists, including a professor from Moscow State University, has developed the first quantitative description of sunspot formation and the Solar activity cycle. By monitoring magnetic field helicity in active regions, they gained insight into the Sun's interior and its impact on solar activity.
Researchers from the University of Michigan and Princeton have discovered a new kind of magnetic behavior that can help make nuclear fusion reactions more efficient. This breakthrough could lead to advancements in nuclear energy, as fusion generates helium without radioactive waste.
Researchers have successfully used flawed but colorful diamonds as sensitive magnetometers to study high-temperature superconductors. These diamond sensors can measure tiny magnetic fields in exotic materials and even human tissue, offering a new tool to explore the physics of these poorly understood materials.
Researchers trained immune cells of mice to fight melanoma using nanoparticles and magnetic fields, with treated tumors stopping growth and six out of eight mice surviving for over four weeks. The study uses artificial antigen-presenting cells to activate naive T cells, revealing a key difference in cancer-fighting cells.
Researchers used NASA's IBEX data to build a computer model of the interplanetary magnetic field, revealing a non-uniform distribution of cosmic ray particles. The findings shed light on why more high-energy cosmic rays are measured coming from one side of the sun than the other.
Recent measurements have validated IBEX's signature finding on the local interstellar magnetic field direction. The consistent picture reveals how the heliosphere is shaped by the interstellar magnetic field, influencing cosmic rays and life on Earth.
Duke University researchers have successfully demonstrated wireless power transfer using a 'superlens' technology that focuses magnetic fields, enabling the transmission of power over distances much larger than traditional setups. This breakthrough could enable smaller, more practical wireless charging solutions for everyday use.
Researchers at Sandia National Laboratories successfully reduced magneto-Rayleigh-Taylor instabilities by adding a secondary magnetic field created by a Helmholz coil to their experiments. This modification allowed the liner to compress fuel more effectively, potentially leading to controlled nuclear fusion.
RAMBO allows researchers to run spectroscopy-based experiments in pulsed magnetic fields of up to 30 tesla on a tabletop. The device enables direct optical access to the sample and combines ultrastrong magnetic fields with short and intense optical pulses.
Researchers at Georgia State University discovered that negative resistivity can produce a positive resistance in GaAs/AlGaAs semiconductor devices under the influence of a magnetic field. The sign reversal in the Hall effect also occurs.
The National Institute of Standards and Technology (NIST) has developed prototype calibration tools for ultra-low field magnetic resonance imaging (ULF-MRI), a technique that provides new contrast mechanisms and practical advantages. The ULF-MRI phantoms are designed to allow direct comparison of performance between ULF-MRI and clinica...
Astronomers have glimpsed the infrastructure of a gamma-ray burst jet using observations from the Liverpool Telescope's RINGO2 instrument. The study reveals that light from the reverse shock wave, which drives back into the jet debris, shows strong and stable polarized emissions.
Scientists at Vienna University of Technology have discovered a way to couple electricity and magnetism in materials, opening up possibilities for new electronic devices such as amplifiers, transistors and data storage devices. The breakthrough involves switching magnetic excitations with an electric field in a material called DyMnO3.
Researchers have developed a nano-SQUID-on-tip that measures magnetic fields at distances as small as a few nanometers from the sample, breaking the record for sensitivity and resolution. This tiny device may also enable measuring the magnetic field from the spin of a single electron, a major breakthrough in magnetic imaging.
Researchers at Rice University discovered the mechanism behind superfluorescent bursts in quantum wells, enabling compact semiconductor devices to produce picosecond pulses of light. The discovery may lead to new telecommunications equipment and other devices transmitting signals at picosecond speeds.
The Solar Wind Electron Analyzer (SWEA) will track how charged particles, such as planetary oxygen ions, escape the planet's atmosphere. By identifying electrons in the solar wind and Martian ionosphere, SWEA can determine where the boundary layer between the two regions is located.
Researchers at Case Western Reserve University are working on an MRI-guided robotic heart catheter to accurately navigate and target tissues in the heart. The technology aims to reduce complications associated with current treatments for arterial fibrillation, allowing doctors to more precisely ablate the affected tissue and restore no...
Researchers have developed a new hyperpolarization technique for MRI scans using naturally occurring pyruvic acid, reducing the need for potentially toxic substances. This breakthrough improves imaging quality and diagnosis while minimizing health risks.
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.
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.
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.
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.
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.
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 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.
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.
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 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.