Articles tagged with Magnetic Fields
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Researchers at the University of Leicester have discovered a new mechanism driving Saturn's massive aurorae, which are fueled by swirling winds in its upper atmosphere. This discovery answers one of NASA's Cassini mission mysteries and highlights the complex interactions between atmospheric weather and aurora creation.
Researchers recreated conditions expected in Mars' core billions of years ago and found that molten metal gave rise to a brief magnetic field. This led to the evaporation of water vapor and eventual loss of Martian oceans about 4 billion years ago.
A new simulation suggests that energy released near a black hole's event horizon during magnetic field line reconnection powers the intense flares. The process involves interactions between the magnetic field and material falling into the black hole, releasing hot plasma particles that radiate away as photons.
Researchers discovered a complex relationship between Jupiter's magnetic field, volcanic activity on its moon Io, and the planet's powerful aurorae. The study revealed an electromagnetic 'tug-of-war' lights up aurorae in Jupiter's upper atmosphere.
Researchers at KTH Royal Institute of Technology discovered a new way Earth's magnetic field produces plasma jets, which can weaken the planet's first line of defense. The study used NASA's Magnetospheric Multiscale Mission satellites to track the formation and origin of these downstream jets.
Astronomers have captured detailed images of sinuous stellar jets emanating from young stars, suggesting that their sidewinding appearances are caused by gravitational attraction from companion stars. The observations were made using the Gemini South telescope's adaptive optics system.
Researchers at Brown University propose a new explanation for the Moon's lack of a strong magnetic field, suggesting that sinking rock formations could have intermittently generated strong magnetic fields. This process could have occurred over the first billion years of the Moon's history, producing intermittent strong magnetic fields.
The study reveals that the region within Io's orbit is dominated by oxygen and sulfur ions, with oxygen prevailing among the two. Further inward, within Amalthea's orbit, oxygen ion concentration increases unexpectedly.
Researchers at Brown University discovered that magic-angle graphene becomes a powerful ferromagnet when spin-orbit coupling is introduced. This finding opens up new possibilities for quantum science research and potential applications in computer memory and quantum computing.
Researchers at MIT have directly observed the interplay of interactions and quantum mechanics in a rotating fluid of ultracold atoms. The team created a spinning cloud of sodium atoms, which formed a needle-like structure before breaking into a crystalline pattern resembling miniature quantum tornadoes.
Researchers create laboratory model to experimentally confirm the behavior of plasma waves as predicted by theory. By studying the properties of liquid metals and high magnetic fields, they successfully generate Alfvén waves in a molten alkali metal, breaking through the sound barrier for the first time.
A magnetic field can be used to switch nanolasers on and off, leading to unprecedented robustness in signal processing. The new control mechanism may prove useful in a range of devices that make use of optical signals, particularly in topological photonics.
Researchers at Lawrence Berkeley National Laboratory developed a method to stabilize graphene nanoribbons and directly measure their unique magnetic properties. By substituting nitrogen atoms along the zigzag edges, they can discretely tune the local electronic structure without disrupting the magnetic properties.
The discovery of electroferrofluids with nonequilibrium voltage-controlled magnetism has the potential to control pattern formation and structures, providing valuable insights into dissipative systems. This system can be used to study transition into dissipative systems and understand how external influences interact with the system.
Researchers have demonstrated a novel semiconductor exhibiting an unconventional large anomalous Hall resistance in the absence of large-scale magnetic ordering. The findings validate a recent theoretical prediction and provide new insights into the phenomenon.
A new study finds that the magnetic field generated by a tsunami can be detected a few minutes before changes in sea level, which could improve tsunami warning systems. The researchers used real-world data from two tsunamis to confirm this relationship and provide valuable insights for improving tsunami source models.
Calculations at TU Wien show that Ramjet propulsion, which involves capturing protons and using them for a nuclear fusion reactor, cannot work as proposed. The analysis revealed huge dimensions required to achieve even minimal thrust, making it impossible for current technology to achieve.
Researchers created 3D DNA-like structures using advanced 3D printing and microscopy, discovering nanoscale topological textures in the magnetic field. This breakthrough enables control over magnetic forces on the nanoscale, promising new possibilities for particle trapping, imaging techniques, and smart materials.
A research team at Osaka University successfully generated megatesla magnetic fields through three-dimensional particle simulations on laser-matter interaction. The strength of MT magnetic fields is significantly stronger than geomagnetism, enabling laboratory experiments that were previously thought impossible.
Astronomers used the VLA to reveal a double helix structure in the magnetic field of M87's jet, tracing material out to nearly 3,300 light-years. The findings suggest that instabilities in the flow of material within the jet could produce the observed double-helix structure.
Researchers discovered a new topological magnet that can induce a billion-fold change in resistance by rotating the magnetic field angle. This phenomenon, called colossal angular magnetoresistance, enables efficient detection of electronic spin states and opens up new opportunities for spin-electronic applications.
The TaRA model combines background magnetic field inhomogeneity and wave amplitude to explain chirping phenomena, simplifying chorus generation phase measurement. Researchers propose this innovative approach for future research on chorus properties.
Researchers track migration of fast ions, revealing routes influenced by Alfvén waves. The observed patterns suggest a large-scale migration among different routes, with some ions escaping the core and others returning to it.
Researchers use NASA's MMS data to study micro-scale physics in the Earth's magnetotail, revealing a key component missing from existing models: an ambipolar electric field. This discovery challenges existing understanding of thin current sheets and provides new insights into space weather
Thermal quenches in fusion devices occur when high-energy electrons escape from the core and fly toward the wall, causing a rapid drop in electron temperature. The researchers propose an analytic model of plasma transport that provides new physical insights into the complex topology of 3-D magnetic field lines.
Scientists at USTC localized electromagnetic fields down to 10^-6 wavelength, increasing field intensity by 2.0×10^8 times and interaction strength by 1.4×10^4 times. This breakthrough enables high-spatial-resolution quantum sensing in nanoscience.
Scientists use squeezed light to improve the sensitivity of a magnetometer, overcoming shot noise limitations. By evading measurement back-action, they enhance the magnetometer's performance and detect smaller changes in magnetic fields.
Theoretical physicists modelled the region around M87's supermassive black hole, confirming that gravity plays a key role in accelerating particles out to thousands of light years. The findings provide further evidence for Einstein's theory of general relativity and its application to astrophysical phenomena.
Recent advances in radiocarbon knowledge have improved our understanding of climate processes, solar activity, geophysics, and the carbon cycle. Researchers developed a more detailed record of atmospheric radiocarbon extending back 55,000 years, helping to understand Earth's past and project future changes.
Researchers developed a novel spintronic-metasurface terahertz emitter that generates broadband, circularly polarized, and coherent terahertz waves. The design offers flexible manipulation of the polarization state and helicity with magnetic fields, enabling efficient generation and control of chiral terahertz waves.
Researchers discovered a novel topological edge soliton that inherits topological protection from its linear counterpart, enabling robust and localized light beams. This breakthrough is achieved through nonlinear photorefractive lattices harnessing the valley Hall effect, without requiring an external magnetic field.
A team of researchers at EPFL and Purdue University has developed a magnetic-free optical isolator using integrated photonics and micro-electromechanical systems. This device can couple to and deflect light propagating in a waveguide, mimicking the effects of magnet-driven isolators without requiring magnetic fields.
A team of researchers used paleomagnetism models and historical documents to create a map of the auroral zone over the last 3,000 years. They found that the auroral zone has moved significantly over time, with notable changes occurring in the 12th century and 18th century.
Researchers have created superionic ice phases XVIII and XX by subjecting water to record-breaking pressures and temperatures. The study provides insights into the formation of these conductive forms of ice and their potential role in explaining the mysterious magnetic fields of Uranus and Neptune.
A research team from Göttingen University observed magnetic forces arranging gas particles in solar prominences, with charged particles moving at speeds of up to 42 km/s. This phenomenon is significant for understanding astrophysical processes, including star and planet formation.
A new study by WMU Professor Michael Famiano and colleagues finds that high magnetic fields in neutron stars can alter the composition of ashes and affect electron capture rates. This discovery has significant implications for our understanding of stellar environments and the formation of elements.
The PHAse Space MApping experiment, a complex plasma physics research project at WVU, aims to study the motion of ions and electrons in plasmas. The facility can measure three-dimensional motion at very small scales and is capable of performing detailed measurements.
Researchers have found a way to stabilize the novel quantum effect in graphene at room temperature, which could lead to breakthroughs in data storage and computer components. The discovery was made using standard microfabrication techniques and showed that the material can generate its own magnetic field.
Scientists have discovered a heterogeneous structure in the Earth's inner core, with adjacent regions of hard, soft, and liquid iron alloys. This finding challenges traditional models of the planet's magnetic field generation and provides new insights into the dynamics at the boundary between the inner and outer core.
Researchers have unveiled a new form of magnetism in Sr2RuO4, which can coexist with superconductivity and exists independently. The discovery was made using muons to detect tiny magnetic fields and is expected to provide new insights for basic and applied research.
Researchers develop a new method to perform logic operations more efficiently and reliably using magnonics. Nanostructured antiferromagnetic wires are well-suited for this purpose, enabling quick and low-energy computation.
New research from Shibaura Institute of Technology reveals that spark plasma sintering produces highly dense MgB2 bulks with improved mechanical and superconducting properties. The resulting samples exhibit superior strengths and high trapped field performance, making them suitable for space applications and electric machines.
Five innovative research projects tackle fundamental questions of environmental and earth science, including the origins of Earth and life on Mars. The studies aim to advance our understanding and lead to important scientific breakthroughs.
The discovery of two-phase superconductivity in CeRh2As2 reveals the material has the highest critical magnetic field to transition temperature ratio of any known superconductor. Researchers found a clear transition between two different order parameters as the applied field is raised, leading to unique thermodynamic properties.
Researchers confirm FDA recommendation that patients keep consumer electronics, such as cell phones and smart watches, six inches away from implanted medical devices. Studies found that these devices can trigger magnet mode in pacemakers and defibrillators, posing a risk to patient safety.
Researchers at Tata Institute of Fundamental Research used extreme magnetic pulses to create large-scale spin patterns, potentially useful for terahertz frequency range electronic devices. The induced spin patterns are robust and stay 'arrested' for up to ten days.
Researchers analyzed rock samples from Eastern Scotland to measure the strength of the geomagnetic field during key time periods. They found that between 332 and 416 million years ago, the field was less than a quarter of its current strength.
Researchers have solved the paradox of the mysterious polarization of the sodium D1 line, revealing that magnetic fields in the solar chromosphere are not entirely unmagnetized. The solution uses complex theoretical modeling and resolves a long-standing debate in solar physics.
Researchers have mapped significant geothermal heat beneath Thwaites Glacier in West Antarctica, revealing a new potential weak spot in the ice sheet's stability. This heat flow, estimated to be up to 150 milliwatts per square meter, could lead to easier sliding of the glacier and potentially accelerate its collapse.
The study reconstructs the movement of southwest Japan from the Cretaceous to the Cenozoic era using paleomagnetic analysis. The researchers found that southwest Japan experienced two clockwise rotations, indicating tectonic rotations during the Paleogene and Neogene periods.
A team from the Russian Quantum Center developed a novel solid-state supersensitive room-temperature magnetometer capable of registering weak electrical sources in the brain. The device successfully detected alpha rhythm, a sinusoidal electric current in the back of the brain, and showed higher sensitivity than existing systems.
Quantum engineers at the University of New South Wales have discovered a new technique to control millions of spin qubits, a critical step towards building a practical quantum computer. This breakthrough uses a novel component called a dielectric resonator to focus microwave power and deliver uniform magnetic fields across the chip.
Scientists have developed a paramagnetic ring that encapsulates water droplets under a magnetic field, enabling precise manipulation. The ring, made of an oil-based ferrofluid, forms spontaneously around the droplet and can be moved remotely by changing the magnetic field.
A new study published in Monthly Notices of the Royal Astronomical Society found that superflares on red dwarf stars occur at high latitudes, near the star's poles, which means they are not directed towards orbiting exoplanets. This reduces the danger to planetary atmospheres and habitability.
Researchers using ALMA data have observed gas re-accreting onto galaxies affected by ram pressure stripping, potentially slowing down their demise. This process creates unique structures resistant to ram pressure's effects, with mass and a sticky nature that holds onto material more tightly.
Scientists at São Paulo State University discovered that compressing paramagnetic salts adiabatically can produce magnetization. The process aligns the particles' spins, resulting in a constant total entropy and magnetized system. This method has potential applications in investigating other interacting systems.
New research reveals that magnetic fields of middle-aged stars become sub-critical, leading to reduced angular momentum losses and altered magnetic field strengths. This phenomenon breaks the relationship between a star's age and its rotation rate, allowing for a diversity of solar-stellar phenomena.
A team of researchers from the Flatiron Institute and Princeton University has found that the magnetic field around a black hole quickly decays when surrounded by plasma. This process, known as 'magnetic reconnection,' rapidly drains the magnetic field and could explain flares seen near supermassive black holes.
Researchers have identified a protein in bird retinas sensitive to the Earth's magnetic field, guiding migratory patterns. This discovery may lead to development of highly sensitive magnetic field sensors for navigation systems.
Researchers have made a groundbreaking discovery about the Sun's magnetic field, revealing that field lines become knotted before emerging at the visible surface. The findings provide conclusive evidence for one of two dominant theories explaining how solar activity occurs.