If so, share your ppt presentation slides online with. Circuit theory for spice of spintronic integrated circuits. The interaction between superconducting and spinpolarized orders has recently emerged as a major research field following a series of fundamental breakthroughs in charge transport in superconductorferromagnet heterodevices which promise new device functionality. This time scale is indeed longer compared to electron momentum relaxation femtosecond time. The virtue of this magnetic tunnel junction 7 was a much larger change in resistance from the parallel to the antiparallel magnetization states. While metallic spintronics has already delivered functional devices gmr read heads in large capacity hard disk drives, and magnetic ram of insulator spintronics magnetic tunnel junctions is expected to hit the market soon, current basic physics research is mostly focused on semiconductor spintronics. Introduction to spintronics overview conventional electronics will be gradually replaced by alternatives that envision information variables to be encoded in the quantum mechanical spin degree of freedom of an electron as opposed to the charge degree of freedom. It has been shown that a current of spinpolarized electrons can change the magnetic orientation of a nanometerscale ferromagnet via an exchange of spin angular momentum 2, 3. In the future we might see spintronics based transistors, which will allow us to replace electronics circuit. Quite surprisingly, in spite of its already long history, this fundamental interaction has been pivotal to several revolutions in the past ten years. Winner of the standing ovation award for best powerpoint templates from presentations magazine. William brown started his pioneer research on magnetic particles and laid out the foundation of micromagnetics theory at the electrical and. Introduction to spintronics is an accessible, organized, and progressive presentation of the quantum mechanical concept of spin.
A new generation of miniature electronic devices like computer chips, light. Spintronics and its application is the property of its rightful owner. Iv semiconductors, recent developments in theory and experimental techniques and potential device applications. Spintronics device theory area we are performing theoretical research on physical mechanism of the behavior of spins and spindependent transport in spintronics devices to. Spintronics, spinpolarized transport, quantum computation. The goal of spintronics is to develop a semiconductor that can manipulate the magnetism of an electron.
Summary electron has a charge electronics and spin spintronics electrons do not actually spin, they produce a magnetic moment that is. On the other hand, the relativistic dirac quantum theory does give g 2. Spintronics, or spin electronics, involves the study of active control and manipulation of spin degrees of freedom in solidstate systems. Keio spintronics network miyake laboratory, osaka university professor kohno at osaka university is doing theoretical research on spintronics, from the. Awschalom editor, junsaku nitta editor this large reference work addresses a broad range of topics covering various aspects of spintronics science and technology, ranging from fundamental physics through. Mrs bulletin volume 31 may 2006 401 a tunnel junction between the ferromagnetic layers. The concise and accessible chapters of nanomagnetism and spintronics, second edition, cover the most recent research in areas of spincurrent generation, spincalorimetric effect, voltage effects on magnetic properties, spininjection phenomena, giant magnetoresistance gmr, and tunnel magnetoresistance tmr spintronics is a cuttingedge area in the field of magnetism that studies the. Spintronics, or spin electronics, refers to the study of the role played by electron and more generally nuclear spin in solid state physics, and possible devices that specifically exploit spin properties instead of or in addition to charge degrees of freedom. Challenges for semiconductor spintronics nature physics. The seminar spintronics and spintronic devices will give an introduction on pintronics and will deal with the recent advances of spintronic devices like the mram, and will make a omparison of the other memories available at present and the advantage of the mram and its technical feasibility. Understanding of spintronics principles and applications gagandeep aulakh assistant professor, khalsa college for women, sidhwan khurd, punjab, india abstract origin of spintronic properties in solid state materials and their relation with spin polarization is shown in this paper. Werpachowska1,2 1institute of physics pas, 02668 warsaw, poland 2college of science by the polish academy of sciences, warsaw, poland abstract for the last years spin effects in semiconductors have been of great interest not only in the context of.
Spintronics burst on the scene in 1988 when french and german physicists discovered a much more powerful effect called giant magneto resistance. In the future we might see spintronics based transistors, which will allow us to replace electronics circuit boards with spintronics ones. Spintronics theory group king abdullah university of. Understanding of spintronics principles and applications. Physical principles of current spintronic devices operation 3. The authors build a foundation of principles and equations underlying the physics, transport, and dynamics of spin in solid state systems. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The solutions of the dirac equations are 4componentvector functions \dirac spinors. These polarized electrons are used to control the electric current. Spintronics spintronicsinvestigates control and manipulation of the electron spin in metals and semiconductors.
The electron is one of the basic constituents of matter. Also explore the seminar topics paper on spintronics with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2015 2016. March scientists prove the existance of a spin battery june scientists discover magnetic superatoms september north carolina stata university gets a 1. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including the theory of giant magnetoresistance and an introduction to spin quantum computing. Giant magnetoresistance of 001fe001cr magnetic superlattices pdf. Physical principles of operation of current spintronic devices 3.
India abstract in our electronic world, since the discovery of electron by j j thomson in 1897, scientists have been working strenuously to build the digital world that we enjoy today. Index terms spintronics, magnetoelectronics, spin polarized transport, logic, circuit theory i. Spindependent scattering of conduction electrons had been observed for some time, but the advent of improved thinfilm vapor deposition systems resulted in the observations in 1988 of large magnetic field. Explore spintronics with free download of seminar report and ppt in pdf and doc format. The concise and accessible chapters of nanomagnetism and spintronics, second edition, cover the most recent research in areas of spincurrent generation, spincalorimetric effect, voltage effects on magnetic properties, spininjection phenomena, giant magnetoresistance gmr, and tunnel magnetoresistance tmr. A new high technology world of spintronic devices has opened to us as a completely new world and some of the devices include spintronic sola cells.
Apr 07, 2012 advantages of spintronics low power consumption. Spintronics is a new branch of electronics in which electron spin in addition to its charge is manipulated to yield a desired outcome. Mram is based on spintronics, and it promises to be a fast, small and nonvolatile memory. Nano technology spintronics magnetic field as the disk spins underneath it. Ppt spintronics powerpoint presentation free to download. Spintronics techniques are capable of much higher speed while requiring less power than the conventional method of using electron charges to represent data. In nanostructures spin polarization of the current adds a dramatic new functionality establishing polarizationbased electronic circuits. Shift from electronics to spintronics opens up possibilities of faster data.
Brief overview of nanomagnetism and spintronics what is spin electronics or spintronics. A mong the future directions, i mention the development of neuromorphic computing using spintronics systems, quantum computing using spin or spinorbit qubits and non abelian topological computing using majorana fermions. Spintronics and quantum computation 301 is known as spin life time or spin relaxation time t 1. Mram is based on spintronics, and it promises to be a fast, small and non volatile memory. Wang, ieee magnetic summer school, june 2015 in 1921, otto stern and walter gerlach performed an experiment which showed the quantization of electron spin into two orientations. This effect originates from the way in which ferromagnets align the spin of conduction electrons along the direction of magnetization. The interest of condensedmatter theory in ferromagnetic metal and semiconductor spintronics is motivated by the following reasons. Spintronics also known as spin electronics, is the study of the intrinsic spin of the electron and. Download ec technical seminar presentation topic on relativistic chips the spintronics theory. It would be nice if there was a section in spintronics about zero gap stuff and it was then linked from graphene at the mention of zero gap to the zero gap section we make in spintronics. Spintronics scientific american transport theory of gmr g. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from.
We explore novel materials for future applications in nano and spinelectronic devices using powerful methods of theoretical solid state physics involving. Preskill introduction to quantum computing meglicki fat schrodingers cat 2level mqc system java applets. In particular, we consider the usual u1 gauge theory for the electromagnetism at classical level in order to obtain the broken continuity equation involving the spin current and spintransfer torque. Perhaps, a more revealing quantity than spin life time is spin diffusion length l s which measures how far electrons diffuse in a solid without losing. The field of spintronics concerns spincharge coupling in metallic systems. Shift from electronics to spintronics opens up possibilities. Ppt spintronics and its application powerpoint presentation. Theory predicts that this torque differs fundamentally from the usual torque exerted by magnetic fields. Spinorbit coupling is central to magnetism and spintronics, where it drives magnetic anisotropy, spin relaxation, magnetic damping, anisotropic magnetoresistance and anomalous hall effect. The seminar spintronics and spintronic devices will give an introduction on pintronics and will deal with the recent advances of spintronic devices like the mram, and will make a omparison of the. Spintronics is a new field of research that studies and applies phenomenon that are dependent upon the spin of electrons. The most direct way to test this prediction experimentally is to study the dynamical motion of a nanomagnet in response to a.
Spintronics, the field of quantum electronics that lies behind this years physics nobel, is arguably a slightly ugly and brutal amalgam of electronics and the electrons quantum property of spin, yet somehow it works. A mong the future directions, i mention the development of neuromorphic computing using spintronics systems, quantum computing using spin or spinorbit qubits and nonabelian topological computing using majorana fermions. Spintronics and promising applications ieee magnetics. Over three volumes and 2000 pages, the handbook of spintronics will cover all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications. Pdf an introduction to relativistic quantum mechanics. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including the theory of giant magnetoresistance and an. Spins, attached to mobile electrons, carry the information. Sep 30, 2010 keio spintronics network miyake laboratory, osaka university professor kohno at osaka university is doing theoretical research on spintronics, from the viewpoint of fundamental physics. Spintronics a new hope for the digital world abhishek gautam sanghvi institute of management and science, indore. Different techniques to inject spin polarization are discussed. Spintronics a portmanteau meaning spin transport electronics, also known as spin electronics, is the study of the intrinsic spin of the electron and its associated magnetic moment, in addition to its fundamental electronic charge, in solidstate devices. Sep 02, 2015 shift from electronics to spintronics opens up possibilities of faster data. A spinbased electronics vision for the future by s. Semiconductor spintronics offers a possible direction towards the development of hybrid devices that could perform all three of these operations.
Information is stored written into spins as a particular spin orientation. In nanostructures spin polarization of the current adds a dramatic. I had no idea what zero gap meant but i deduce it is a part of spintronics theory. Rashba effect consequence of spin orbit interaction, proportional to electric field in a structure with inversion asymmetry the crystalline quality, surface topography, and thermal stability of the films indicate the possibility of growing epitaxial ge on top of mn5ge3 so that epitaxial trilayers or spin valves and perhaps even multilayer structures can be fabricated for. Still the only known spintronics textbook written in english, introduction to spintronics, second edition is a must read for those interested in the science and technology of storing, processing, and communicating information via the spin degree of freedom of electrons. Anisotropic magnetoresistanceeffect amr was used in the magnetic read heads of earlier generations. Spintronics does not require unique and specialized semiconductors. Ordinary electric current is the flow of electrons through a wire conductor see electricity.
Wang, ieee magnetic summer school, june 2015 early research on magnetism at university of minnesota prof. Spintronics seminar report, ppt, pdf for ece students. Current spintronics in hdd readheads and memory chips 2. Awschalom editor, junsaku nitta editor this large reference work addresses a broad range of topics covering various aspects of spintronics science and technology, ranging from fundamental physics through materials properties and processing to established and emerging device technology and applications. Research center for spintronics research network, tohoku. Superconducting spintronics university of cambridge. The aim of this course is to provide an introduction to spintronics from a condensedmatter theory pointofview. Ec technical seminar presentation topic on relativistic. Spintronics article about spintronics by the free dictionary. These directions could massively benefit from spintronics concepts. Introduction pintronics, the technology of control and manipulation of the spin state of electrons and nanomagnets, is one of the most promising approaches for beyond cmos logic, memory and analog applications 15.
433 711 555 55 1432 590 1433 534 903 274 216 1209 1406 906 165 379 445 698 754 376 880 178 1167 323 1322 721 1057 321 157 517 1046 12 928 1108 525 704 39 198 131 1148 466 345 1086 709 13