During a six-experiment pulse this week, the previous world record for laboratory-produced magnetic fields was broken by Los Alamos National Laboratory researchers. The hundred-tesla field, about 2 million times Earth’s magnetic field was produced with the help of a 1,200-MJ motor generator.
Researchers at Helmholtz Center in Germany have developed a magnetic valve that could be an enabling technology for spintronics. The new structure allows for data to remain stored even after electric current has been cut, and memory in the valve can be re-written indefinitely.
Researchers at the Max Planck Institute have put together a sandwich of a ferroelectric layer between two ferromagnetic materials that responded to a short electric pulse. This changes the magnetic transport properties of the material in such a way that information can be placed in four states instead of just two. The potential increase in storage density is great.
Instead of using a magnetic field to record information on a magnetic medium, researchers in the U.K. recently harnessed much stronger internal forces and recorded information using only heat. This new method allows the recording of terabytes of information per second, hundreds of times faster than present hard drive technology.
On the shortest of time scales magnetic spins do not behave according to existing theory. According to a research team which has formulated a new theory of ultrafast magnetism, the spins are not coupled and move at a different pace, dependent on the element they're part of.
In magnetic recording media, each individual bit of information is stored over an area containing tens of grains. Engineers have until now had difficulty pushing beyond a one terabit per square inch limit by either reducing grain size or reducing the grains per bit. Researchers in Singapore have solved the problem by using something called bit-patterned media.
Although of purely scientific interest for now, a method that researchers at the SLAC National Accelerator Laboratory have invented to alter magnetic properties in manganese-oxide materials without heating them up could greatly speed up low-voltage, non-volatile computer memory.
A University of Bristol team has dissolved iron in liquid surfactant to create a soap that can be controlled by magnets. The discovery could be used to create cleaning products that can be removed after application and used in the recovery of oil spills at sea.
Physicists in Australia have observed a new kind of interaction that can arise between electrons in a single-atom silicon transistor. The study results open the door for new quantum electronic schemes in which it is the orbital nature of the electrons—and not their spin or their charge—that plays a major role.
Phase-change random access memory (PCRAM) is a promising technology for next-generation non-volatile memory, but it has been limited by room temperature efficiency. A research group in Japan recently invented a variation of PCRAM that achieves a magnetoresistance effect of more than 2000% at room temperature and higher, and doesn’t require the use of magnetic elements such as cobalt and platinum.
Scientists from IBM and the German Center for Free-Electron Laser Science have built the world's smallest magnetic data storage unit. It uses just twelve atoms per bit, the basic unit of information, and squeezes a whole byte (8 bits) into as few as 96 atoms.
Using powerful magnets to levitate fruit flies can provide vital clues to how biological organisms are affected by weightless conditions in space, researchers at The University of Nottingham say. The team of scientists has shown that simulating weightlessness in fruit flies here on earth with the use of magnets causes the flies to walk more quickly.
In the 1950s, researchers first observed phonon drag, a thermoelectric effect that occurs as electrons move past atoms in a solid. Physicists predicted an analogous phenomenon in magnetic materials, but aside from indirect indications of its existence, magnon drag has been elusive. Until now.
A technique that lets researchers monitor single cancer cells in real time as they float in liquid could help doctors study the breakaway tumor cells that cause cancer growth, or metastasis. The approach uses magnets to rotate cancer cells in a way that lets their spinning speed reveal their shape and status.
A little piece of iron wire is magnetic—just like a huge iron rod. When it comes to material properties, size usually does not matter. Surprisingly, researchers from Austria and India have now discovered that some materials show very unusual behavior, when they are studied in the form of tiny crystals. This could now lead to new materials with tailor-made electronic and magnetic properties.
Reliable use of magnetic materials in manufacturing and R&D requires exact information of magnetic field distribution. German software firm Matesy has developed a new visualization and measurement system called CMOS-MagView that it has used to help develop a new type of magneto-optical sensor.
Conventional cantilevers used in magnetic-force microscopes have been compromised either by a low resistance to magnetizing force from the sample material, or by lack of resolution due to coatings that protect them from magnetism. A new composite developed in China avoids both drawbacks.
When doping a disordered magnetic insulator material with atoms of a nonmagnetic material, the conventional wisdom is that the magnetic interactions between the magnetic ions in the material will be weakened. However, when the antiferromagnetic insulator barium manganate was doped, the barium manganate's magnetic excitations were surprisingly unreduced in strength and energy.
An advanced material that could help bring about next-generation "spintronic" computers has revealed one of its fundamental secrets to a team of scientists from Argonne National Laboratory and NIST.
The United States Department of Energy (DOE) announced a $3 million grant to Argonne National Laboratory to further research in developing better, cheaper, and lighter magnets.
Conductors like copper heat up, limiting circuit densities. Materials that exhibit the quantum spin Hall effect offer flow without the need for heat dissipation, but they are hindered by magnetic imperfections. Researchers at RIKEN in Japan believe they’ve solved this problem.
Scientists at the University of Massachusetts Amherst report that for the first time they have designed a much simpler method of preparing ordered magnetic materials than ever before, by coupling magnetic properties to nanostructure formation at low temperatures.
Spanish researchers have designed what they believe to be a new type of magnetic cloak, which shields objects from external magnetic fields, while at the same time preventing any magnetic internal fields from leaking outside, making the cloak undetectable.
Used in Hollywood and the advertising industry to create exotic special effects, ferrofluids are seemingly magical materials that are both liquid and magnetic at once. In a study, a team from Yale University, with colleagues from the University of Georgia and Massachusetts Institute of Technology, demonstrated for the first time an approach that allows ferrofluids to be pumped by magnetic fields alone.
Neutron scattering studies of "cobalt blue," a compound prized by artists for its lustrous blue hue, are revealing unique magnetic characteristics that could answer questions about mysterious properties in other materials.