Articles tagged with Magnetic Fields
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.
A new mini-sensor, Chip-scale Atomic Magnetometer (CSAM), has successfully measured the magnetic field of the human brain. The sensor's room temperature operation capability makes it more versatile than conventional cryoelectronics, which are limited to low temperatures.
The NASA Goddard Space Flight Center has delivered magnetometers for NASA's Mars Atmosphere And Volatile EvolutioN (MAVEN) mission. The instruments will measure the magnetic field on Mars, helping scientists understand particle motion and the solar wind's interaction with the planet's atmosphere.
Scientists discover that the sun does not have a bow shock due to insufficient speed to create one in the tenuous region. The new data from IBEX and Voyager spacecraft indicates a strong external magnetic field influencing the heliosphere's structure, leading to a new paradigm.
Researchers observed an intermittent motion of magnetic flux in a superconducting strip, resulting in alternating static and dynamic phases with zero and non-zero voltage peaks. The study's findings have potential applications for gate devices controlling on/off states in electrical systems.
Scientists at Penn State's Arecibo Observatory have discovered flaring radio emission from an ultra-cool star, shattering the previous record for lowest stellar temperature at which radio waves were detected. The star, named J1047+21, is a brown dwarf with a surface temperature not much higher than that of a giant planet.
Researchers at Duke University have developed a new technique to assemble crystalline structures using varying concentrations of microscopic particles and magnetic fields. They demonstrated the creation of over 20 programmed structures, paving the way for advanced optics, data storage, and bioengineering applications.
Researchers analyze Hinode and SOHO data to show the north pole's magnetic field is weakening faster than predicted, while the south pole's polarity remains unchanged. The findings suggest an imminent solar maximum, potentially occurring before 2013, with significant implications for solar activity and space weather forecasts.
Researchers from Complutense University of Madrid have mathematically shown that particles in magnetic fields can escape into infinity, never stopping. The phenomenon occurs under specific conditions, including the presence of current loops on the same plane and a large radius for the spherical surface.
Researchers at NASA's Goddard Space Flight Center discovered a unique solar pattern, dubbed 'coronal cells,' in the sun's corona. These cells are characterized by bright centers and dark boundaries, occurring in areas between coronal holes and filament channels, with implications for magnetic fields and solar wind emission.
Researchers have developed a honeycomb pattern of nano-sized magnets that can store computable information and reduce interactions between neighboring magnets by two-thirds. The arrays can be read by measuring their electrical resistance, enabling potential for faster and more efficient computing.
Researchers at Universitat Autonoma de Barcelona manufacture a cylinder that hides contents and makes them invisible to magnetic fields, paving the way for the invisibility of light. The device uses high-temperature superconductor material and is fully isolated from external magnetic fields.
Computer simulations performed at Sandia National Laboratories demonstrate a high-gain nuclear fusion method, releasing energy 100 times greater than input current. The technique uses a magnetic field to suppress heat loss during implosion, potentially leading to reliable electricity production from seawater.
Scientists from Stanford University and SLAC National Accelerator Laboratory have created a system of 'designer electrons' with unique properties. By tuning the fundamental behavior of electrons, researchers can create exotic variants of ordinary electrons that may lead to new types of materials and devices.
A team of researchers from Harvard and MIT suggests that massive asteroid collision is responsible for the Moon's magnetic anomalies. The anomaly is found around the rim of a 2,400-kilometer-diameter crater known as South Pole-Aitken.
A team of researchers from Germany and the Netherlands has developed a novel material that enables the switching of spin currents at room temperature in a vertical magnetic field. This breakthrough increases storage density distinctly and has potential applications in future hard discs and non-volatile random access memory devices.
Scientists have probed the internal structure of antihydrogen atoms using microwave radiation, providing insight into their behavior. The results show that specific frequencies cause the spins to flip, ejecting the atoms from the trap and confirming a key aspect of antihydrogen's properties.
Researchers from Duke University and Boston College created a metamaterial that enhances magnetic forces without harming biological tissues or damaging electrical equipment. This breakthrough could lead to more efficient and safer applications of electromagnetism in devices such as magnetic levitation trains.
Researchers at Harvard Medical School have successfully induced magnetization in yeast cells by manipulating their iron transport system. This breakthrough provides new insights into the mechanisms of magnetization and its potential applications, including bioprocessing, tissue engineering, and therapeutic cell tracking. The study's fi...
Researchers at Georgia Institute of Technology have successfully squeezed a property called the nematic tensor, describing rubidium atoms in Bose-Einstein condensates. This achievement improves measurement precision for atomic clocks and magnetometers, with potential applications to quantum information systems.
Researchers discover several new phases of atomtronic matter, including a 'bond-order solid' with strong long-range dipole interactions. These phases are associated with the controlled movement of ultracold atoms in an optical lattice and have potential applications for data encoding and quantum computing.
A team of international scientists has developed a new way of magnetic recording that uses only heat to process information hundreds of times faster than current hard drive technology. This breakthrough could make future magnetic recording devices significantly faster and more energy-efficient.
Researchers at the Max Planck Institute for Astrophysics have created a high-precision map of the Milky Way's magnetic field using radio observations from over 30 researchers and 41,000 measurements. The map reveals both large-scale and small-scale features of the Galactic magnetic field, including turbulence in the gas.
The study found that weightlessness affected over 200 genes and hypergravity altered the expression of 44 genes. The findings suggest that prolonged space flight should not be underestimated, as the effect of weightlessness on cellular processes can have significant impacts.
Scientists at the University of Nottingham used a powerful magnet to levitate fruit flies, simulating weightlessness on Earth. The results show that the flies walk more quickly than expected, suggesting potential effects on living organisms in space. The study provides valuable insights for future space exploration and long-term survival.
Researchers developed a new navigation system that can accurately steer microbots through complex blood vessels, enabling precise drug delivery or tumor destruction. The system uses an external magnetic field to generate two distinct types of microbot movements: helical and translational motions.
A 'fantastic voyage' through the body is now possible with precision control thanks to a new capsule endoscope developed by Tel Aviv University researcher Dr. Gabor Kosa. The device uses MRI technology to navigate the digestive tract, enabling doctors to detect problems and perform biopsies or local drug delivery in a non-invasive manner.
The study reveals that Cygnus X has formed a 'cocoon' of trapped cosmic rays, which were accelerated by the intense stellar winds and shockwaves. This finding provides a unique glimpse into the early life of cosmic rays, long before they diffuse into the galaxy.
RUB researchers have solved the puzzle of the solar wind's temperature and energy equipartition by incorporating particle collisions into their model. This new approach explains experimental data significantly better than previous calculations, with implications for other dilute cosmic plasmas.
Recent experiments in the DIII-D tokamak have shown that spinning plasma can prevent magnetic island formation, which reduces fusion power production. By applying torque to spin the plasma faster while minimizing stray magnetic fields, tokamak fusion performance can be raised.
Physicists at Georgia Tech developed a unified theory describing coexistence of liquid and pinned solid phases of electrons in 2D under magnetic field. The theory predicts transition between phases as field is varied, showing emergence of hexagonal Wigner crystal with enhanced stability due to quantum correlations.
Scientists have found the first gamma-ray pulsar in a globular cluster, J1823-3021A, which is also the youngest millisecond pulsar discovered to date. Its high luminosity and strong magnetic field challenge current theories on its formation.
Scientists have developed a material that exhibits physical properties similar to graphene, including superconductivity and magnetic behavior. The discovery was made by combining ultra-high magnetic fields with the unique composition of SrMnBi2, which allows for easy doping with foreign atoms.
The MESSENGER mission has provided unprecedented data on Mercury's magnetic field, revealing a host of firsts, including evidence of widespread flood volcanism and direct measurements of its surface composition. The study sheds light on the planet's global magnetic field geometry and its interaction with solar wind.
A Johns Hopkins team discovered that MRI's strong magnet pushes on fluid in the inner ear's balance organ, leading to vertigo. This finding may affect results of functional MRI studies and could lead to a non-invasive method for diagnosing balance disorders.
Scientists have created an 'antimagnet', which can protect pacemakers and other medical devices from strong MRI signals. The device uses superconducting materials and metamaterials to control magnetic fields, making it undetectable.
Researchers at Penn State University have invented a method using magnetic fields to purify hybrid nanoparticles, which are composed of two or more kinds of materials. This technique will help improve drug-delivery systems, drug-targeting technologies, medical-imaging technologies, and electronic information-storage devices.
A Kaiser Permanente study of 801 pregnant women found a significant link between maternal magnetic field exposure during pregnancy and the development of asthma in their children. Women with high MF exposure were more than three times as likely to have an asthmatic child, highlighting the need for awareness about EMF health effects.
Researchers at ICN2 have developed a new technique to write magnetic data, eliminating the need for cumbersome magnetic fields and providing simple, reversible writing of memory elements. This breakthrough could lead to non-volatile MRAMs, allowing instant power-up and significant energy savings.
Researchers found that uneven temperatures in semiconductors can create electronic whirlpools and sideways magnetic fields, leading to a new effect on thermopower efficiency. The discovery could improve the efficiency of commercial semiconductor devices
Researchers use old mathematical techniques and insights on CMEs to devise a fresh way to measure magnetic fields in the sun's upper atmosphere. By spotting a diffuse ring around a CME, they can determine the strength of the magnetic field using Alfvén speed.
Researchers develop protocol using existing technology to measure and manipulate magnetic spin of electrons for spintronics applications. This breakthrough aims to overcome limitations of conventional computing devices, such as power consumption and data loss.
A team of scientists found that solar minimums lead to geomagnetic effects on Earth due to the speed of the solar wind, interplanetary magnetic field strength, and coronal hole placement. Coronal holes caused a decrease in solar wind speed and southward magnetic components, resulting in lower geomagnetic effects.
Researchers at Temple University discovered that a magnetic field can reduce blood viscosity by 20-30%, posing a potential new way to prevent heart attacks. By polarizing red blood cells and streamlining their movement, the magnetic field decreases friction against blood vessel walls.
A new supercomputer simulation reveals that the collision of two neutron stars can naturally produce the magnetic structures thought to power short gamma-ray bursts. The study provides the most detailed glimpse of the forces driving some of the universe's most energetic explosions.
Researchers from NIST have created a new method to make neutral atoms behave as if they are charged particles in an electric field. This allows for the simulation and study of fundamental electrical phenomena, including superconductivity and the quantum Hall effect. The synthetic electric fields mimic the behavior of charged particles ...
Astronomers have spotted extremely hot matter near a black hole just milliseconds before it plunges in. The unique observations suggest that some matter may be escaping via highly structured magnetic fields.
A pattern of X-ray 'stripes' in the Tycho supernova remnant supports a theory on how magnetic fields amplify near expanding shock waves, accelerating particles to extreme energies. The discovery may provide direct evidence for the production of cosmic rays.
Researchers at UC Riverside have created nanoscale iron oxide particles that form rods and display colors when exposed to a magnetic field. The technology has potential applications in color displays, bio-sensing, and biomedical labeling.
Cornell researchers have discovered a new method for measuring current-induced torques in nonvolatile magnetic memory devices, which can write information without using magnetic fields. This breakthrough aims to improve the efficiency of these devices by reducing the need for large currents and thick wires.
A team from Montana State University solved the mystery of missing sunspots from 2008 to 2010, which coincided with unusually weak magnetic fields at the sun's poles. The discovery allows for the prediction of space weather, influencing technology in space and on Earth.
Computer simulations suggest that changes in plasma flow within the Sun, which resembles ocean currents, contribute to prolonged solar minima. The team discovered that a faster flow during the first half of the solar cycle can lead to an extended period without sunspots and weak polar magnetic fields.
Researchers discovered that migrating sea turtles rely on a combination of two magnetic parameters: inclination and intensity. By detecting these variations, the turtles can extract more information from the Earth's field than initially apparent.
Researchers used NASA's THEMIS spacecraft to track energetic particles in Earth's magnetic atmosphere during a substorm, gaining insights into their origin and behavior. The study supports the betatron acceleration model, which explains how electrons gain energy from changing magnetic fields far from the reconnection site.
Researchers at NIST found that layering graphene on a substrate transforms its properties, creating hills and valleys that hinder electron mobility. The study uses a scanning tunneling microscope (STM) to investigate graphene's ideal properties in real-world conditions.
A study by Dini et al. investigates the effect of 6 mT Static Magnetic Field (SMF) on phagocytosis in human macrophages, finding that it depends on the degree of macrophage differentiation. The results suggest that moderate intensity SMF can modify cell surface morphology and influence fluid-phase endocytosis and phagocytosis.
Researchers have developed a new technique using rotating light to observe nuclei indirectly via orbiting electrons, providing complementary information to conventional NMR. This method uses Optical Faraday Rotation and can magnify the signal by creating a long optical path in a short tube.