Articles tagged with Magnetic Fields
Researchers have observed elusive oscillations in the Sun's corona, known as Alfvén waves, that transport energy outward from the surface of the Sun. These discoveries can help unlock secrets of the corona's heat and solar storms, and improve our understanding of how the Sun affects Earth.
Researchers have developed a new test that can diagnose common brain diseases like Alzheimer's and schizophrenia with high accuracy. By analyzing tiny magnetic fields produced by neuron activity, the test can identify patterns associated with these debilitating diseases.
University of Arizona physicists have discovered 'super crystals' in certain organic semiconducting solids, which could create splashes of current and exhibit unique electrical properties. This discovery was made possible by analyzing experimental data from a previous study on a mysterious solid-state phase in a semiconductor.
The study identifies dominant damping mechanisms in iron, cobalt, and nickel, pointing to improved material design techniques. This discovery enhances the prediction of magnetic materials' dynamics, crucial for high-performance electronic devices.
Physicists have discovered that correcting a typo in an e-mail requires dozens of bits of information, each forcing its polarity to align up or down. The researchers found that the spin precession effect, where magnetic fields exert forces on neighboring spins, can lead to avalanches if not properly damped.
Researchers at Ames Laboratory have observed two-dimensional equilibrium patterns in lead samples when in its superconducting state, below 7.2 Kelvin. These complex patterns differ from the long-held textbook model proposed by Lev Landau and represent a significant contribution to the field of superconductivity.
A team of Johns Hopkins undergraduates has invented a handheld metal detector to aid in the removal of orthopedic screws from patients' bodies. The device emits a tone that rises in pitch as the surgeon moves closer to the screw, guiding them to hidden hardware.
Researchers at MIT have successfully demonstrated wireless power transfer using coupled resonant objects, enabling the charging of devices without physical connections. The team's 'WiTricity' concept uses magnetic fields to transfer energy efficiently, promising a future free from bulky batteries and power cords.
Critical high-temperature superconducting materials exhibit metallic behavior, similar to ordinary metals. This discovery paves the way for a deeper understanding and potentially higher critical temperatures, bringing us closer to room temperature superconductivity.
The study reveals that the Sun's magnetic field allows the release of wave energy from its interior, enabling sound waves to travel through fountains into the solar chromosphere. This discovery sheds light on why the chromosphere is hotter than the star's surface and has significant implications for climate variability.
A new highly sensitive NMR technique using a microscopic detector decreases protein sample size by several orders of magnitude, making it possible to diagnose diseases like Alzheimer's and Huntington's at an early stage. The technology could lead to the development of tabletop NMR devices in every research laboratory and medical office.
Researchers at NIST developed arrays of spin valves to trap and manipulate individual biomolecules. The arrays can apply torsional forces strong enough to alter the structure or shape of biomolecules, enabling parallel processing of single molecules.
A RAND Corporation report found mixed results from laboratory tests of Save the World Air's ZEFS device, suggesting its effectiveness in reducing tailpipe pollutants and increasing fuel efficiency is uncertain. Further testing is needed to confirm or refute the technology's performance.
A new study reveals that homing pigeons have a complex three-dimensional pattern in the sensory dendrites of their beak skin that reacts to the Earth's magnetic field vector. This allows them to identify their geographical position without relying on visual cues.
Scientists have discovered a new phase transition in metal YbRh2Si2 at absolute zero, revealing additional changes to electronic properties. This study extends our understanding of phase transitions and is relevant to complex systems like high-temperature superconductors.
Researchers have observed the quantum Hall effect in a new form of carbon called graphene at room temperature, pushing the phenomenon's boundaries. The discovery opens up possibilities for measuring resistance standards at elevated temperatures and magnetic fields.
A research team at Northwestern University has identified Bi-2212 as a suitable material for the new wires needed to build a 30 Tesla magnet, a significant improvement over current materials. The findings set a speed limit for high-temperature superconductivity, which could enable powerful magnets without helium cooling requirements.
The NARVAL observatory, installed at the Bernard Lyot Telescope, allows scientists to study magnetic fields of stars and their impact on planetary formation. SU Aurigae's complex magnetic 'web' was observed using NARVAL and ESPaDOnS, revealing new insights into stellar evolution.
A University of Houston research team has been awarded a $1.6 million grant to build the most powerful magnetic field sensor to date. The sensor, which could be hundreds or thousands of times more sensitive than current models, will have applications in both military and medical fields.
Researchers at NIST created nanodot arrays with uniform response to magnetic fields, reducing variation by 5% and identifying key design cause. This breakthrough enhances prospects for commercially viable nanodot drives with increased storage capacity.
New findings indicate that near-Earth space weather is driven by the merging rate of Earth's and sun's magnetic fields, not solar wind's electric field. Researchers developed a formula predicting 10 types of space weather activity, including aurora and magnetic disturbances.
Researchers at NIST have successfully used mechanical motion to induce rotation in rubidium atoms in a gas, generating an oscillating magnetic field. The technique allows for the detection of atomic spins with high precision, opening doors for applications such as high-performance magnetic sensors and quantum computer components.
Researchers have developed a way to precisely control magnetic fields in thin magnetic films, enabling the storage of information in permanent memory. The new technology allows for faster and more efficient data storage, overcoming the limitations of current hard drive technology.
Researchers at Max Planck Institute have found a way to easily reverse vortex cores, creating a digital bit that is extremely stable. This mechanism can be used for a new magnetic storage concept, where magnetic pulses can efficiently reverse the vortex core with no losses and quickly.
Researchers at Rice University's Center for Biological and Environmental Nanotechnology have developed a revolutionary, low-cost technology to clean arsenic from drinking water. The nanorust technique reduces arsenic levels in contaminated water to below EPA thresholds, offering a sustainable solution for millions of people worldwide.
Ultra-narrow superconducting wires show enhanced superconductivity when exposed to strong magnetic fields. Researchers developed a theory explaining this phenomenon, proposing that oxygen exposure forms magnetic moments on the wire surfaces.
Scientists at Harvard University have developed a method for creating microfluidic channels with parallel metal wires, allowing for the control of magnetic components. The method uses polydimethylsiloxane resin and molten solder to produce stable metal cables, which can generate strong magnetic fields within the channel.
Researchers at NIST have measured the Einstein-de Haas effect in a ferromagnetic thin film, shedding light on magnetization dynamics and g-factor calculations. The study provides a proof-of-concept for using this effect to determine critical material properties for data storage and spintronics applications.
The National High Magnetic Field Laboratory will receive a $11.7-million grant to build an innovative magnet that can generate extremely high magnetic fields using less power than traditional magnets. The new magnet will enable unique experiments in nuclear magnetic resonance (NMR) to study proteins, nucleic acids, and other molecules.
Researchers at Lawrence Berkeley National Laboratory have developed a novel laser-based MRI technique that offers enhanced sensitivity and time resolution. The approach uses atomic magnetometry and separates signal encoding and detection steps, enabling optimized sensitivity and reducing costs.
A US-Australian research team has detected radio pulses from a magnetar star, XTE J1810-197, which is giving off extraordinary radio pulses. The finding links this rare type of star with the much more common 'radio pulsars', reordering our understanding of these neutron stars.
Researchers using ESA's XMM-Newton satellite data have found an object in the heart of a 2,000-year-old supernova remnant that exhibits complex and intriguing properties. The object, called 1E161348-5055, has a cycle that repeats every 6.7 hours, which is tens of thousands of times longer than expected for a young neutron star.
Researchers measure lifetimes of low-energy excitations in MnF2, a model system for understanding spin wave interactions. The data provide insight into the nature and strength of these interactions, helping to answer a longstanding question in physics.
New X-ray data from Chandra reveals that magnetic fields are responsible for the prodigious amounts of radiation emitted by super-massive black holes. The discovery uses a scale model in our galaxy to understand how all black holes work, including those powering quasars.
Researchers found that magnetic waves propagate simultaneously in all directions in a Bose Einstein condensate state at high magnetic fields and low temperatures. The discovery reveals a 'lost dimension' effect due to atomic behavior in quantum states.
Researchers observe dimensional reduction in Han purple pigment at low temperatures, which affects magnetic waves' behavior and could aid understanding of quantum computers. The discovery provides insights into the quantum mechanics of the universe, potentially explaining mysterious properties of other materials.
Researchers have discovered the Universe's strongest magnetic field, generated by violent collisions between neutron stars. The discovery sheds light on the mysterious short Gamma-ray bursts, which are the most powerful explosions in the universe. Scientists believe that strong magnetic fields play a crucial role in their formation.
The discovery of a double helix nebula near the Milky Way's black hole center suggests an extremely strong and highly ordered magnetic field. This twisting wave is thought to be caused by the interaction between the galaxy's magnetic field lines and a disk of gas orbiting the black hole.
The NCAR team predicts that Cycle 24 will produce larger-than-usual sunspots, affecting satellite orbits and power systems. Scientists developed a model tracking subsurface movements of sunspot remnants for more than 98% accurate forecasts.
A new theory published in Geophysical Research Letters explains the energization of anomalous cosmic rays by including a realistic termination shock shape. The model shows that particles are accelerated on the flanks of the termination shock, contradicting previous assumptions.
Astronomers have long hoped to find magnetic forces shaping interstellar clouds, and now they've done so. A helical magnetic field was detected around the Orion Molecular Cloud, providing the first evidence of its structure.
Researchers at Johns Hopkins University have developed a new type of magnetic memory cell that can store large amounts of information in a densely packed area. The cells, made up of tiny cobalt or nickel rings, are immune to stray magnetic fields and can be controlled on-demand.
Researchers at Rice University developed a new magnetic method to overcome the 'dark exciton effect' in semiconducting nanotubes, which could enable more efficient optical signals and reduced power demands in next-generation microchips.
Research on Martian aurorae reveals localized ultraviolet emissions near magnetic field lines. Air pollution reduction could exacerbate global warming due to increased solar radiation scattering. A new study detects potential oilfield brine leaks in Nueces Bay, Texas, using sediment resistivity and radium isotope analysis.
Researchers discovered hundreds of auroras on Mars over six years, linked to strong magnetic field patches in the crust. These events produce ultraviolet light and are not as colorful as Earth's auroras.
The grant will support two graduate and five undergraduate students at Prairie View A&M University in Texas, as well as a postdoctoral position at North Carolina A&T University. The magnet lab will provide hands-on research experience for minority researchers, aiming to increase their participation in extreme conditions research.
MARSIS reveals a 'lumpy' ionosphere on Mars with unexpected bumps related to strong magnetic fields, providing insights into the planet's subsurface. The discovery sheds light on what happened to water that likely carved deep canyons on Mars.
The Florida State University magnet lab has collaborated with Keithley Instruments to develop a more accurate system for measuring extremely small currents and voltages. The new AC and DC Precision Current Source with Nanovoltmeter will help engineers create breakthrough consumer products and medical devices.
Researchers propose a new magnetic herding technique that manipulates colloidal objects using magnetism, offering flexibility and convenience over existing methods. The technique has potential applications in biosensors, medical diagnostic devices, and microelectronic components.
Researchers at the University of Illinois have fabricated superconducting nanowires to measure magnetic fields. The devices exhibit periodic oscillations in resistance when a magnetic field is applied, reflecting wave nature of matter and quantum mechanics.
Scientists have identified solar wind flowing from funnel-shaped magnetic fields in the Sun's corona, originating in coronal funnels with a speed of about 10 km/s. This discovery improves our understanding of the solar wind's magnetic nature and source region.
Researchers at Northwestern University show that a magnetic field can be used to increase or decrease the flow of heat through an Andreev interferometer. The findings, published in Physical Review Letters, demonstrate the quantum mechanical nature of heat flow and its relationship with electron charge.
Computer simulations of black holes have revealed that the process of matter accretion is more complex than previously thought. The new findings show that magnetic fields play a crucial role in creating violent disturbances in density, velocity, and magnetic field strength near the event horizon.
A massive gamma-ray flare from a magnetar was detected by the RHESSI satellite, emitting as much energy in two-tenths of a second as the sun gives off in 250,000 years. The event's immense power suggests a solution to the origins of short-duration gamma ray bursts.
Researchers created high-quality superconducting wires with molecular dimensions, showing that theories apply to molecular-scale superconductors. The nanowires showed a remarkably weak effect on magnetic fields, contradicting previous expectations.
A NYU physicist has isolated the first source of ultra-high energy cosmic particles using a new analysis technique. The discovery provides a breakthrough for cosmic ray astronomy, allowing researchers to study material particles from the distant universe in greater detail.
Researchers have built a laboratory model of the Earth's molten core using sodium metal to simulate its behavior. The Madison Dynamo Experiment is designed to fill gaps in current understanding of how magnetic fields arise and grow, shedding light on fundamental questions about the planet's magnetic field generation.
Astronomers have discovered a quadra-polar nebula with two disks formed at different times, challenging the companion-star-only model. The study, led by C. Robert O'Dell, used sharp new images from the Hubble Space Telescope to reconstruct the 3D structure of the Helix Nebula.
A new NASA book, 'Touch the Sun,' allows visually impaired students to explore solar science through embossed color pictures, Braille, and large-print descriptions. The book features 16 photographs of the sun and space weather, selected by Dr. Joseph Gurman and Steele Hill.
Researchers at Los Alamos National Laboratory have discovered a rare state of matter, Bose-Einstein condensation (BEC), in the ancient pigment Han Purple when subjected to intense magnetic fields. This finding represents a significant breakthrough in quantum physics and has implications for advanced computing technologies.