Spintronics News, Resources & Information
Spintronics is the new science of computers and memory chips that are based on electron spin rather than (or in addition to) the charge (used in electronics). Spintronics is an exciting field that holds promise to build faster and more efficient computers and other devices
Researchers from France's CNRS developed a new method (based on AFM microscopy and lasers) that can measure and image the spin of very thin films at the nanoscale. Here's a nice video detailing the new development, while also giving an introduction to Spintronics:
Researchers from the University of Utah developed a new topological insulator made from bismuth metal deposited on silicon. This material may be very suitable for quantum computers and fast spintronic devices.
This new material has the largest energy gap ever predicted. It can also be used alongside silicon so this material may be relatively easy to be used alongside current semiconductor technology.
Researchers from the University of Utah have managed to control and read spin information at room temperatures. For this experiment, they used an orange OLED device.
The researchers were able to read the nuclear spins of two hydrogen isotops: a single proton and deuterium (a proton, neutron and electron). When the researchers controlled the spin, they controlled the electrical current in the device.
A team of researchers from Germany, the UK, Japan and the Czech republic developed an efficient spin-charge converter based on GaAs. This is the first time that such an efficient spin-charge converter was developed from a "common" material (comparable efficiences were only observed in converters made from platinum).
A spin-charge converter enable the transformation of electric into magnetic signals and vice versa. These converters are essential tools for efficient, simply and precise spin manipulation using electric fields. The main principle behind these converters is the so called spin-Hall effect.
This massive two-volume 1,500 pages book covers all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications.
Comprising 60 chapters from a large international team of leading researchers across academia and industry, this book provides readers with an up-to-date and comprehensive review of this dynamic field of research.
Researchers from IBM Research labs in Zurich developed a Spintronics based small-sized, low cost non-optical, non-contact position sensor. This sensor detect changes in a high-gradient magnetic field of a microscale magnetic dipole. The sensor can achieve sensitivities of up to 40 Ohm/µm, which leads to a noise floor of 0.5 pm/sqrt(Hz) over more than a megahertz bandwidth.
Magnetoresistance-based position sensors have been known for a long time, but their use in nanotechnology was limited due to a relatively low sensitivity and a large amount of hysteresis. These issues were solved by IBM by operating the spintronic sensor close to the pole of a micromagnetic dipole. This is where the magnetic field has an extremely high gradient, which increases as the dimensions of the micromagnet are scaled down.
Researchers from the Johannes Gutenberg University Mainz (JGU) managed to directly observe the 100% spin polarization of a Heusler compound. A Heusler alloy is made from several metallic elements arranged in a lattice structure, and the researchers used the compound Co2MnSi. This paves the way towards using Heusler materials for spintronics devices.
Spin polarization is the degree of parallel orientation of the spins of the electrons that transport the charge. The ideal spintronics material has the maximum possible spin polarization. The Heusler alloy used in this material was shown to have an almost complete spin polarization at room temperature.