Articles tagged with Magnets
A team of US and Chinese researchers has directly measured how individual electronic quantum states in a kagome magnet respond to external magnetic fields, shifting energy in an unusual manner. They found that Dirac fermions exhibit momentum-dependent shifts under the applied field.
Scientists have achieved efficient quantum coupling between two distant magnetic devices, which can host magnons and exchange energy and information. This achievement may be useful for creating new quantum information technology devices.
A team of engineers and scientists has developed a proof-of-concept for a magnetic tentacle robot that can navigate the narrow tubes of the lung, enabling doctors to take tissue samples or deliver cancer therapy. The device measures just 2 millimeters in diameter and uses an autonomous magnetic guidance system to guide it into place.
Researchers tested the magnetic field output of various portable electronic devices and found that strong magnets can disrupt the operation of implanted pacemakers or ICDs. The recommended safety distance varies between 0.8 cm for some devices, highlighting the need for awareness among cardiac patients.
Researchers at Goethe University Frankfurt have grown crystals with rare-earth atoms that exhibit surprising fast magnetic properties. The team found that the strength of these reactions can be adjusted by choosing different atoms, opening up possibilities for optimizing spintronics components.
Researchers at UCL have created a technique called magnetomechanical stimulation that uses microscopic magnetic particles to control touch-sensitive brain glial cells. This allows for precise and remote activation of astrocytes, providing a new tool for understanding their function and potential treatment of neurological disorders.
Researchers discovered a novel type of magnet, the antiferromagnetic excitonic insulator, which involves strong magnetic attraction between electrons in a layered material. The new state emerges when electrons form bound pairs with holes and trigger an antiferromagnetic alignment of adjacent electron spins.
A new study by Tel Aviv University researchers found that microplastics absorb and concentrate toxic organic substances, increasing their toxicity by a factor of 10. This may lead to severe impact on human health due to contaminated food and drink.
Rice University scientists discovered that strong magnetic fields can manipulate the material's optical phonon mode, a phenomenon previously unseen. The effects were much stronger than expected by theory, revealing a new way of controlling phonons.
Researchers have created a new rubber-like solid substance with surprising qualities: it can absorb and release large quantities of energy. The material is programmable, thanks to its use of tiny magnets embedded in an elastic substance, enabling predictable phase transitions.
Researchers developed a novel robotic replica of a human spine with an artificial disc implant and soft magnetic sensor array. The system can classify five different postures of the spine with 100% accuracy, providing physiologically relevant data before invasive surgeries.
Researchers at NIMS successfully fabricated high-performance neodymium magnets using machine learning, optimizing processing conditions with limited experimental data. By leveraging active learning and Bayesian optimization, they were able to achieve better magnetic properties than conventional sintered magnets.
Researchers at Harvard have successfully observed quantum spin liquids, a previously unseen state of matter that has been elusive for nearly 50 years. By manipulating ultracold atoms in a programmable quantum simulator, the team was able to create and study this exotic state, which holds promise for advancing quantum technologies.
Researchers at Tel-Aviv University have shed light on the Sigma-1 receptor's topology and function in neurodegenerative diseases. The study reveals that the receptor is retained in the endoplasmic reticulum and its amino end faces the cytoplasm, providing a crucial mechanism for therapeutic approaches to alleviate suffering from ALS.
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.
Researchers have developed fish-shaped microrobots that can guide themselves to cancer cells using magnets, where a pH change opens their mouths to release chemotherapy. The microrobots demonstrate promising capabilities for targeted cancer treatment, but need further improvements in size and tracking methods.
Researchers have discovered a way to manipulate orbiting debris with spinning magnets, allowing for gentler maneuvering and potential repair of malfunctioning objects. The technology has the potential to help clear space junk from Earth's orbit and extend the life of satellites.
Researchers at Skoltech and their colleagues have successfully created a magnetic material by 3D printing a gradient alloy from nonmagnetic powders. The resulting alloy exhibits ferromagnetic properties, opening up potential applications in machine engineering, such as electrical motors.
A recent study has found that the COVID-19 pandemic led to a significant increase in cases of children ingesting small magnets and button batteries, which can cause serious harm or even death. The American Academy of Pediatrics reports that emergency departments saw a higher proportion of battery and magnet ingestions during the pandemic.
Researchers have developed a novel process to manufacture extreme heat-resistant carbon-carbon composites, which will be tested on a U.S. Navy rocket launching with NASA this fall. Additionally, they created a technology that more realistically emulates user activities to improve cyber testbeds and prevent cyberattacks.
Magnetomicrometry offers a new approach to controlling prosthetic limbs by measuring muscle length and speed, providing more precise control than existing methods. The technology involves inserting small magnetic beads into muscle tissue, which can be precisely measured within milliseconds.
Researchers have directly measured the interaction between an ultraviolet laser and a relativistic electron beam in a dipole magnet. The study shows that energy modulation of the electron beam can be effectively tailored, leading to precise bends in the pathway and improved FEL pulse properties.
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.
Researchers developed magnetic, biodegradable nanomaterials that reduced the likelihood of mice fathering pups for at least 30 days. The nanoparticles were non-toxic to cells and gradually eliminated from the body.
Researchers at the Department of Energy's Lawrence Berkeley National Laboratory developed an ultrathin magnet that operates at room temperature, enabling high-density, compact spintronic memory devices and new tools for studying quantum physics. The discovery makes a significant breakthrough in creating 2D magnetic materials.
Researchers at Nagoya University have observed a new type of topological defect in chiral magnets, which has implications for fields of physics and technology. The team used Lorentz transmission electron microscopy to visualize the defects, revealing contrasting pairs of bright and dark areas.
Researchers at Ewha Womans University have created ultra-stable single-atom magnets that can maintain their magnetic state over days. Using Scanning Tunneling Microscopy, the team achieved atomic-scale control of magnetic fields within quantum architectures.
Researchers at Tohoku University have developed a new magnet design that changes brightness based on viewing angle, utilizing chiral organic molecules in layered crystal structures. The material exhibits magic mirror characteristics and can be switched by low magnetic fields.
Scientists create hydrobot, a small water droplet manipulated by magnetic beads, for various applications. Hydrobot can move with precision and even stop at random, making it suitable for dust collection and surface cleaning.
A team of researchers has successfully controlled the magnetic state of two-dimensional van der Waals magnets using light, enabling efficient data storage and fast data processing. By inducing 'magnetic anisotropy' with ultrashort pulses of light, the scientists can manipulate the material's magnetic properties on demand.
The study investigates chirality in magnetic structures, revealing a memory effect for helicity after phase transition to achiral state. Coauthors describe the importance of chirality in defects and dislocations.
A new class of magnetic materials has been introduced for spin caloritronics, paving the way for versatile recycling of ubiquitous waste heat. The developed molecule-based magnet exhibits low thermal conductivity and efficient magnon excitations, making it an attractive alternative for energy harvesting from waste heat.
A recent study published in the Archives of Disease in Childhood found a significant rise in young children swallowing magnets over the past 5 years in the UK. Nearly half of these cases required surgery for retrieval, highlighting the dangers of small, powerful magnets, especially those intended for toys.
The patented technology uses magnetic nanoparticles to capture lithium and other critical materials from brines, offering a more efficient and cost-effective process. This innovation has the potential to reduce energy consumption and create new domestic supply chains for these essential elements.
Researchers have discovered an exotic new state of matter in the Kondo insulator ytterbium dodecaboride, which exhibits properties of both metals and insulators. The study used a newly developed 75-tesla duplex magnet to suppress insulating properties and measure quantum oscillations.
Physicists discovered a discontinuous phase transition in a quantum magnet, mirroring the behavior of water, allowing for precise control over its quantum properties. The study reveals critical-point physics, which is essential for understanding topological phases and protected qubits in these materials.
The Muon g-2 experiment has shown fundamental particles behaving in a way not predicted by the Standard Model of particle physics. Researchers have confirmed discrepancies that have been gnawing at scientists for decades.
A recent study found a significant increase in high-powered magnet-related injuries in children after the ban was lifted, with cases increasing by 355% and hospitalizations rising by 39%. The study calls for stricter regulations on these products to protect children and emphasizes the importance of keeping them out of reach of young ones
Researchers induced artificial magnetic texture in nonmagnetic graphene by pairing it with a magnet, overcoming a long-standing obstacle in the field of spintronics. The findings have potential to revolutionize electronics and enable more powerful semiconductors, quantum computers, and other devices.
Researchers at D-Wave and Google achieve a significant computational performance advantage in simulating the topological phenomena behind the 2016 Nobel Prize in Physics. The study demonstrates that quantum effects can be harnessed to provide a scaling advantage, increasing with both simulation size and problem hardness.
Researchers successfully manipulated magnets at the atomic level using ultrashort laser pulse excitation, reducing magnetic switching time by 1000 times. This breakthrough enables novel means to control magnetism, essential for efficient data processing technologies.
Researchers developed more efficient magnets to control magnetic nanoparticles for targeted drug delivery. Non-symmetrical magnet combinations showed almost ten times stronger magnetic force than regular cylindrical magnets, which could potentially apply to humans too.
Scientists at US national laboratories develop a new state-of-the-art half-meter-long prototype magnet that meets requirements for use in existing and future light source facilities. The design offers nearly twice the current capacity with a higher magnetic field, enabling significant improvements in efficiency and cost savings.
A team of scientists from Shibaura Institute of Technology developed a cost-effective method to enhance the properties of magnesium diboride superconductors using ultrasonication. This approach resulted in a higher critical current density, making bulk MgB2 more accessible and simpler to fabricate.
Researchers at PPPL and Commonwealth Fusion Systems successfully simulated particle confinement in the SPARC tokamak device, crucial for achieving commercial fusion energy. The study predicts well-confined alpha particles will minimize damage to the facility, paving the way for plasma self-heating and improved techniques for control.
Researchers at Aalto University developed a new way to break the reciprocity law by changing material properties periodically. This breakthrough could lead to efficient nonreciprocal devices, such as compact isolators and circulators, for next-generation communication systems.
Scientists create tiny Janus balls that change color under a magnetic field, potentially used in inks for anti-counterfeiting tags. The technology could help manufacturers stay one step ahead of sophisticated counterfeiters.
A new magnetic memory device based on spintronics has been developed to enhance the energy efficiency of SOT-MRAM. The device uses ultrathin iron germanium telluride material that switches from a hard magnet to a soft magnet when a small current is applied.
Researchers at the Paul Scherrer Institute report the discovery of three-dimensional magnetic 'vortex rings' within a tiny pillar made of gadolinium cobalt. These structures, consisting of doughnut-shaped vortices, provide fundamental insight into intricate nanoscale structures inside bulk magnets.
Researchers found a significant increase in emergency department visits for children who swallowed small high-powered magnets after changes in federal regulations. The study suggests that the rise in magnet-related injuries may be attributed to the new rules, which have allowed for the sale of these magnets without safety restrictions.
The PPPL has been awarded $3 million from ARPA-E and $1 million from the DOE Office of Science to develop permanent magnets for stellarators. This project aims to simplify the complex design of twisty plasma fusion devices, which could become an attractive candidate for a fusion pilot plant.
Researchers have created a magnetic switch that requires less energy to alter its orientation, a potential breakthrough in storing data in personal electronics. The new technology uses voltage instead of current to reorient magnetic materials, resulting in significant energy savings.
Physicists at Martin-Luther-University Halle-Wittenberg and Central South University found a way to enhance magnetism's response to electrical fields by stacking magnetic layers. This mechanism can be precisely controlled, allowing for efficient electrical control of magnetic signals.
Scientists have discovered a new way to design magnets with high operating temperatures, large coercivity, and low density. The novel lightweight magnets could complement or compete with traditional inorganic magnets in various applications.
Scientists have successfully produced and studied a quantum spin liquid (QSL) in a new material called EDT-BCO. The QSL emerges due to the unique structure of the material, which includes triangularly organized dimers and sublattice of carboxylate anions.
Researchers have developed a lightweight molecule-based magnet with unprecedented magnetic properties, exhibiting a 'memory effect' at elevated temperatures. The compound contains abundant metal chromium and inexpensive organic molecules, making it a promising alternative to current inorganic commercial magnets.
High-speed cameras reveal intricate behavior of metal alloy samples under extreme stretching. Researchers discovered that a well-established magnetism model can accurately predict material deformation, offering new insights into the Portevin-Le Chatelier effect.
Researchers have discovered a new approach to create a spin pattern in a magnet, enabling faster creation of skyrmions. This discovery offers an additional method for more efficient magnetic data storage, with potential applications in cloud data centers.
Researchers found evidence of a quantum spin liquid in ruthenium trichloride, which could lead to new insights into magnetic materials and their applications. The discovery was made using a novel technique called resonant torsion magnetometry, which precisely measures the behavior of electron spins.
Researchers at Kiel University found that neglected magnetic interactions play a key role in stabilizing skyrmions, increasing their lifetime and opening up new material systems. The discovery could enhance the stability of skyrmions, enabling their use in future electronic devices and data storage concepts.