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 Japan's Kyoto University and Osaka University have demonstrated that spin currents can travel more than half a micrometer on a thin doped-germanium sheet. Up until now this has only been demonstrated in very low temperatures (below 225 Kelvin).
Germanium has a higher electron mobility than silicon and a particular lattice symmetry that should reduce much of the electrons spin relaxation. But the material is not magnetic and so measuring spin transport is not easy because spin currents have to be created in a magnetic material and injected into germanium.
This book provides an introduction to spintronics-based ultra-low power and highly reliable computing. It discusses spintronics logic from device-level to the system-level, and includes information on magnetic memory cells, device modeling, hybrid circuit structure, design methodology, CAD tools, and technological integration methods.
Researchers from France's Universite Paris-Sud and the CEA institute discovered that the probabilistic nature of Spin-Torque MRAM (STT-MRAM) devices can be used to create synapses-like neural system - effectively to create low-power devices that mimic the human's brain method of operation.
MRAM cells (or MTJs) store data using electrons magnetic spin, which is a stochastic switching type of device - that needs to apply a current for a long-enough time to make sure the information changed as you wish. In this new suggestion, you take advantage of the stochastic switching and apply current for a short time - which can be used to make the device learn progressively. This effectively means that MTJs can be "trained" to learn new information.
The Singapore's National Research Foundation (NRF) announced a new S$5 million ($3.7 million USD) fund to support Spintronics industry collaborations with research institutes in Singapore.
Last year the National University of Singapore together with Nanyang Technological University launched a new consortium (the Singapore Spintronics Consortium, or SG-SPIN), with an aim to encourage collaborative research partnerships between industry and the academia. The new $3.7 million fund will support existing and new SG-SPIN projects.
This book covers the aspects of theoretical and experimental approaches for silicon based spintronic materials. The theory parts emphasize on two first-principles methods - the GW method to improve the insulating gaps of the half metals which are a class of materials ideal for spintronic applications, and the linear response theory to calculate electric and magnetic susceptibilities.
Researchers at Trinity College in Dublin discovered a new class of magnetic materials, based on Mn-Ga alloys. The Mn2RuxGa, a zero-moment half metal, has some unique properties that may make it especially suited for spintronics applications.
The Mn2RuxGa material has no net magnetic moment, but it has full spin polarization. This means that is does not suffer from its own demagnetizing forces and it does not create any stray magnetic fields. It is also immune to external magnetic fields. Coupled with spin polarization, this means it may be extremely efficient in spintronics as there will be no radiation loss during magnetic switching.
Researchers from the University of Michigan developed a new compound, created from a unique low-symmetry crystal structure, that is very promising for spintronics applications.
The new crystal compound is made from Iron, Bismuth and Selenium, and this creates a complex crystal that offers greater flexibility compared to current crystalline structures. The researchers says that the new compound enables them to arrange atoms in a huge number of different combinations so that they can manipulate conductivity and magnetism independently.