Articles tagged with Magnetic Fields
Researchers elucidate a global picture of edge states in Weyl semimetals, revealing how they form closed trajectories under tilted magnetic fields. The study provides new understanding of the three-dimensional quantum Hall effect and its relation to topological properties.
RAMBO-II will produce stronger magnetic fields and probe samples with an even broader spectrum of intense laser pulses. This upgrade enables researchers to study materials under extreme conditions, advancing the frontiers of materials physics and chemistry.
A massive spinning black hole powers a plasma jet through magnetic reconnection, releasing energy in 'mini-jets' that produce high-energy gamma radiation. This phenomenon explains how the energy reaches the jet's core from the black hole and ultimately originates from its rotation.
For the first time, researchers have measured the global magnetic field of the solar corona. By applying magneto-seismology to observations from Coronal Multi-channel Polarimeter (CoMP), they mapped the magnetic field in the global corona using wave propagation speed and density data.
Researchers at Cornell University developed a graphene-based Hall-effect sensor that can operate over a greater temperature range than previous sensors. The device can detect miniscule changes in magnetic fields, even within a larger magnetic background, making it ideal for various technological applications.
A team of scientists, led by RMIT University, has developed a new class of quantum sensors using high-performance diamond particles embedded in conventional glass fibers. This breakthrough enables the creation of cheap quantum sensor networks for applications such as underwater monitoring and mining.
Scientists developed a theoretical method to model the interior of ice giants Uranus and Neptune, allowing analysis of thermal and electrical processes. The study provides insights into the planets' geometry and evolution, including the existence of frozen cores and magnetic field generation.
Scientists found that in actual materials, there's no critical point for quantum phase transitions in a genuine zero-field environment. Instead, many-body interactions impose order on matter at low temperatures.
Researchers at POSTECH developed a remote magnetic-sensitive artificial catalyst called MAG-NER, which shows high catalytic efficiency within living cells. The catalyst transforms non-fluorescent reactants into fluorescent products through implanting MAG-NER into living cells and applying alternating magnetic fields.
Researchers have developed a new method to map the magnetic field of the solar corona using near-infrared observations. The technique, presented in a recent study, can provide detailed maps of the coronal magnetic field across the entire observable corona.
Scientists have found a way to measure the quantum distance of Bloch states in solids by applying a magnetic field, enabling the detection of anomalous Landau level spreading. This discovery reveals that the quantum metric plays a crucial role in determining material properties.
Scientists developed a new model using NASA's Solar Dynamics Observatory data, predicting seven of the Sun's biggest flares from the last solar cycle. The model identified key characteristics in active regions, including magnetic reconnection and unstable arches, to predict massive flares.
A recent study published in Nature Astronomy reveals the location of energy release in solar eruptions, finding that relativistic electrons are accelerated in a specific region known as the magnetic bottle. This breakthrough confirms a theoretical model and provides new insights into the complex process of solar flares.
A team of researchers has presented a new look at the 'central engine' powering a massive solar flare, revealing an enormous electric current sheet and magnetic bottle-like structure. The study offers the first measurements characterizing the magnetic field and particles at the heart of the explosion.
Researchers use VLA radio telescope to image galaxy NGC 4217's magnetic field, extending far beyond the galaxy's disk. The dynamo theory suggests that this massive magnetic field is generated by plasma motion within the galaxy's disk.
Researchers analyzed the magnetic field of Milky Way-like galaxy NGC 4217 and discovered unique structures such as X-shaped fields, helices, superbubbles, and giant loops. These findings suggest a connection between star formation and supernovae explosions in shaping the galaxy's magnetic field.
Researchers from USTC obtained the ultimate precision for estimating all three components of a magnetic field with entangled probe states under the parallel scheme. They found that tradeoff comes from incompatibility of optimal probe states and presented an approach to quantify tradeoff.
Scientists have created magnetic nanodiscs that can detect and respond to mechanical forces, offering a new method for studying neural responses and potentially leading to new therapeutic treatments. The discovery could provide a more precise and non-invasive alternative to existing neurostimulation techniques.
Anomalous geomagnetic activity detected in South Atlantic Ocean, potentially hindering satellites due to increased solar particles. Volcanic rocks on Saint Helena island reveal variation in magnetic field directions higher than expected at the latitude.
Researchers at MIT watched as a supermassive black hole's corona was abruptly destroyed, causing its brightness to drop by a factor of 10,000 in under a year. The corona eventually rebuilt itself, sparking hopes for understanding how black holes' coronas are heated and powered.
Researchers at the University of Michigan have discovered a method to stabilize plasma compression using twisted magnetic fields. The technique reduced escaping plasma tentacles by 70% and improved conditions for studying extreme plasma states.
Researchers at Columbia University have observed fractional quantum Hall states (FQHS) in a monolayer 2D semiconductor, demonstrating excellent intrinsic quality and establishing it as a unique test platform for studying FQHS. The study reveals unexpected behavior and suggests that 2D semiconductors are close-to-ideal platforms to furt...
Researchers at DOE/Princeton Plasma Physics Laboratory have gained new insights into the sawtooth instability, a cooling phenomenon that interferes with fusion reactions. The discovery, rooted in abstract mathematics, suggests an alternative explanation for the phenomenon when the safety factor drops to around 0.7.
Robert Weigel is analyzing three-dimensional magnetosphere state using magnetohydrodynamic simulations to understand auroral boundary expansion during extreme events. His goal is to identify cause and quantify model uncertainty of extreme geomagnetic and geoelectric field enhancements.
A study compares the effective magnetic moments of different multicore nanoparticle systems, showing they are magnetic-field dependent. The findings are important for optimizing magnetic nanoparticles for various applications, including magnetic hyperthermia and targeted drug delivery.
Researchers found that newborn particles interacting with powerful electromagnetic fields produce pulsars' unique beams of radio waves. The discovery could improve pulsar timing arrays and shed light on fast radio bursts.
A Cornell University team has discovered a way to control electron spin transitions using acoustic waves, eliminating the need for magnetic fields. This breakthrough enables the development of smaller, more power-efficient acoustic sensors for navigation technology and other applications.
Researchers develop implant that uses magnetic energy to produce high-frequency signals for treating epilepsy, Parkinson's disease, chronic pain and other conditions. The miniaturization enables wireless power delivery and minimally invasive procedure.
A team of researchers has discovered that quasar jets change from parabolic to conical shapes at a distance from the black hole, similar to flared jeans. This finding challenges the long-held assumption of narrow cone-shaped jets and provides new insights into black hole acceleration.
A team of Brown University physicists has developed a new type of compact, ultra-sensitive magnetometer that could be useful in applications involving weak magnetic fields. The device uses the anomalous Hall effect and is up to 20 times more sensitive than traditional Hall effect sensors.
Researchers have discovered high-Chern-number and high-temperature Chern insulator states in MnBi2Te4 devices, exhibiting multiple dissipationless edge states above liquid helium temperature. Theoretical calculations reveal the origin of these states as a magnetic Weyl semimetal with layer-dependent Chern number.
Researchers have made significant progress in understanding plasma behavior at the edge of fusion facilities, which could help achieve fusion power. The Gkeyll code simulates turbulent fluctuations and reduces particle flux near the plasma edge, potentially increasing efficiency.
Researchers have developed a magnetic field sensor that can be used in both industry and biomedicine, offering high sensitivity and local interaction with magnetic materials. The sensor was patented last year and has the potential for applications in flaw detection and biomedical fields.
Researchers have discovered high-Chern-number and high-temperature Chern insulator states in MnBi2Te4 devices, exceeding previous records by achieving two dissipationless edge states above 10 K. The findings have the potential to revolutionize low-consumption electronics and integrated circuits.
Engineers have demonstrated a technology that can transmit electricity wirelessly to recharge electric cars, robots or even drones while they move. The system boosts efficiency to 92% and can transmit 10 watts of electricity over short distances.
Researchers have developed a microneedle that effectively targets and remains attached to cancerous tissue in lab experiments without needing continuous application of a magnetic field. The new technology allows for more precise drug delivery, avoiding unwanted side effects.
Scientists apply strong magnetic fields to weakly-magnetic molecules, inducing new optical and photophysical properties. This discovery could allow scientists to change electronic properties of some classes of molecules using magnetic fields as a handle. The research uses the world's strongest magnet for NMR spectroscopy.
Researchers from UBC have discovered a new timeline for the ancient magnetic field on Mars, with evidence of dynamo activity at 4.5 billion and 3.7 billion years ago. The findings suggest that the Martian dynamo was active earlier than previously thought, providing insights into the planet's thermal history and evolution.
Researchers at ICFO have successfully searched for axions, hypothetical particles thought to make up 80% of the universe's mass, using a new technique involving Bose-Einstein condensates. The study confirms the ability to detect short-range spin-dependent forces with much shorter ranges than previous experiments.
A study of 369 solar-like stars reveals that the Sun's solar brightness variations are among the weakest, with fluctuations typically about 5 times stronger in other stars. The research suggests that our star may have been unusually inactive over the past 9000 years.
Researchers analyzed 369 solar-like stars and found that the Sun is less magnetically active and variable than similar stars. The study suggests that most stars are five times more variable than the Sun over the last 140 years, with potential explanations including long-term variability or unrecognized differences.
Researchers at Rensselaer Polytechnic Institute have discovered an optical version of the quantum hall effect, unlocking new properties of excitons in two-dimensional semiconductors. This breakthrough could lead to advancements in quantum computing, memory storage, and solar energy harvesting.
University of Wisconsin-Madison physicists have provided an explanation for the discrepancy in solar wind temperature. By applying mirror machine theory, they found that the hot electrons stream from the sun to large distances, losing energy slowly and distributing it to trapped particles.
Physicists have successfully isolated and characterized Bethe strings in a real solid for the first time. The team used high magnetic fields to investigate SrCo2V2O8 crystals, obtaining a phase diagram that confirms their presence.
Researchers have created a device capable of converting low-level magnetic fields into usable electricity, with 400% higher power output than existing technology. This technology has significant implications for designing self-powered wireless sensor networks in smart buildings, potentially leading to substantial energy savings.
A case report published in HeartRhythm Case Reports describes a patient whose e-cigarette caused magnetic reversion in their implantable cardioverter-defibrillator, interrupting its ability to detect heart rhythm problems. The incident highlights the importance of keeping electronic devices away from medical-grade implants.
Scientists at Peking University have discovered Majorana zero modes (MZMs) at both ends of 1D atomic line defects in iron-based high-temperature superconductors. The MZMs exhibit robust properties and can be detected using scanning tunneling microscopy/spectroscopy, offering a promising platform for topological quantum computing.
Scientists have proposed using permanent magnets to simplify the design and production of stellarators, which are twisty fusion facilities that can produce massive amounts of energy. This innovation could lead to the creation of simpler, non-twisted coils and lower costs for engineering and manufacturing.
A team of engineers at UNSW Sydney has successfully controlled the nucleus of a single atom using only electric fields, solving a problem that stood for over half a century. This breakthrough has major implications for the development of quantum computers and sensors, enabling precise control over individual atoms.
Researchers created a new acoustic smart material inspired by shark skin that can mimic three key electronic devices: a switch, logic gate, and diode. The material changes its properties in response to magnetic stimuli, allowing for on-demand transmission and switching.
Sandia National Laboratories has received funding to develop a patient-friendly brain imager that uses quantum sensors for more accurate and accessible measurements. The new system aims to enable people with chronic pain and motor disorders to participate in MEG scans, improving the accuracy of diagnoses.
Researchers developed time-resolved magnetic laminography technique to visualize magnetic state in three dimensions. This allows for understanding of complex magnetization patterns and behavior, crucial for next-generation data storage and processing.
Scientists have discovered that Mars' magnetic field is ten times stronger than previously estimated, with fluctuations revealing clues about the planet's upper atmosphere. The findings provide valuable insights into Mars' interior structure and how it formed.
A team of Rice University engineers has introduced the first neural implant that can be both programmed and charged remotely with a magnetic field. The integrated microsystem, called MagNI, incorporates magnetoelectric transducers that allow it to harvest power from an alternating magnetic field outside the body.
Researchers at TU Wien successfully measured a novel quantum effect in neutron spin, demonstrating inertial effects. The experiment involved exposing neutrons to a rotating magnetic field, revealing the coupling between spin and rotation.
A team of scientists using the Low Frequency Array (LOFAR) radio telescope has detected radio waves from exoplanets interacting with their star's magnetic field, which can heat and erode a planet's atmosphere. The discovery paves the way for novel ways to probe exoplanet environments and determine habitability.
Researchers studied phase transitions in ultracold gases under fluctuating magnetic fields, showing loss of symmetry in energy spectrum. The 'Hofstadter's butterfly' effect disappears as time dependence is introduced.
Researchers suggest that axionic dark matter surrounding compact stars can prevent catastrophic magnetic field losses while allowing for abnormal rotation. This theory provides an alternative to previous understanding of rapidly rotating objects with strong magnetic fields.
The NSF's Daniel K. Inouye Solar Telescope has produced its first images, showcasing a pattern of turbulent plasma that covers the entire sun. This breakthrough will enable scientists to better understand space weather and its impacts on Earth.
Magnetic nanostructures show promise in biomedical applications, including cell separation and targeted cancer treatment. High tumor cell death rates were observed with weak magnetic fields, suggesting a strong mechanical force that destroys tumor cells.