In the race to develop the next generation of storage and recording media, a major hurdle has been the difficulty of studying the tiny magnetic structures that will serve as their building blocks. Now a team of physicists at the University of California, Davis, has developed a technique to capture the magnetic "fingerprints" of certain nanostructures - even when they are buried within the boards and junctions of an electronic device.
In order to achieve higher storage densities on computer disks, the last decades were dominated by optimization of magnetic materials, i.e. the magnetic particles (grains) were gradually shrunk while, at the same time, the magnetic stability (magnetic anisotropy) was increased. Usually, about 100 to 600 grains form one bit, i.e. the nowadays smallest storage unit.
The logic and memory functions of future electronic devices could shrink dramatically - to one or two nanometers (billionths of a meter) instead of the many tens of nanometers that characterize today's most advanced elements - if a way can be found to control domain walls, the ultrathin transition zones that separate regions of a material having different magnetic, electric, or other properties.
Scientists at U.S. Department of Energy's Argonne National Laboratory used inelastic neutron scattering to show that superconductivity in a new family of iron arsenide superconductors cannot be explained by conventional theories.
Using the same type of nanotechnology that enables hard drives to read and write data, researchers at Stanford University have developed a system that should be able to detect cancer in the human body. The blood scanner,...
In a magneto-electric material, a magnetic field can induce a ferroelectric moment-a displacement of the ions that creates an electric field. Similarly, an electric field can induce a change in the material's magneti...
Two materials, the cuprates, discovered in the mid-1980s, and the iron-based pnictides, discovered in 2008, have been classified as unconventional superconductors. In these materials, the mechanism for superconductivity is believed to be different to that of conventional superconductors, such as aluminum, in which lattice vibrations bind electrons into the so-called Cooper pairs that carry the supercurrent.
The fast pace of growing computing power could be sustained for many years to come thanks to new research from the UK's National Physical Laboratory (NPL) that is applying advanced techniques to magnetic semiconducto...
The tunnel effect of magnetization, a highly unusual property of the world of quantum mechanics discovered by the Magnetism Group of the Department of Fundamental Physics at the University of Barcelona (UB), led by Profe...
Physicists have taken a significant step toward creation of quantum networks by establishing a new record for the length of time that quantum information can be stored in and retrieved from an ensemble of very cold atoms. Though the information remains usable for just milliseconds, even that short lifetime should be enough to allow transmission of data from one quantum repeater to another on an optical network.
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