Spin transport in magnetic nanostructures how is spin. With gmr, the resistance of a magnetic multilayer is affected by the relative orientation of its magnetic layers due to electron spin dependent scattering. Spindependent transport phenomena in magnetic nanostructures. Spin injectionand nonlocal spin transport inmagnetic. Pdf second harmonic detection of spindependent transport. Cornell university 2007 in this thesis, i have employed point contact spectroscopy to determine the nature of electron transport across constrained domain walls in a ferromagnetic nanocon.
In contrast, magnetism originates from the other attribute, spin. It reveals how key phenomena first discovered in one class of materials, such as spin injection in metals, have been revisited decades later in other materials systems, including. Spindependent transport through magnetic nanojunctions. For the stt effect, a spin polarized electric current is used to alter the magnetic state of a ferromagnet. Spin dependent transport and spin transfer in nanoconstrictions and current confined nanomagnets ozhan ozatay, ph. For coherent transport we found reduction of the magnetoresistance, which can be even negative for asymmetric junctions. The spindependent transport problem is solved numerically through the use of the. Spin dependent transport in magnetic nanostructures crc press book in magnetic systems of nanometer size, the interplay between spin and charge of electrons provides unique transport phenomena. Moreover, it is commonly assumed that magnetic materials or materials possessing high spinorbit coupling soc are needed to observe spindependent charge transport. The dependence of magnetic spin and orbital moments and spin correlations on particle size and temperature are of interest. Coherent electronic transport through a molecular device is studied using nonequilibrium greens function negf formalism.
For the stt effect, a spinpolarized electric current is used to alter the magnetic state of a ferromagnet. Spindependent transport through chiral molecules studied by. After the charge seebeck and peltier effects are introduced, we present spindependent charge and heat transports in the framework of motts twocurrent model for spinup and spindown electrons. Chapter 2 described by inoue is an introduction to spindependent transport in. Although challenges in their synthesis still remain, the development of organic spintronics has triggered strong interest in highperformance organic. Edited by two of the worlds leading authorities, spin dependent transport in magnetic nanostructures introduces and explains the basic physics and applications of a variety of spin dependent transport phenomena in magnetic nanostructures with particular emphasis on magnetic multilayers and magnetic tunnel junctions. Radiation effects on the magnetism and the spin dependent transport in magnetic materials and nanostructures for spintronic applications volume 30 issue 9 jiwei lu, s. Cofeb free 3 cclayers should be in close contact with the magnetic layers. Spintransport and transfer in magnetic nanostructures. Spindependent transport through a quantum wire with magnetic. Chapter 5 describes studies of spin transport in nanodevices incorporating superconductors.
Second harmonic detection of spin dependent transport in magnetic nanostructures article pdf available in chinese physics letters 272 february 2010 with 39 reads how we measure reads. Since the magnetization of the free layer can however be easily reoriented by relatively. An interpretation of the observed behavior is suggested based on a combination of spin orbit and magnetic impurity scattering. Inoue department of applied physics, nagoya unirersity.
In this sense, the spin charge separation of electrons is a starting point for the physics of spin electronics. Spin dependent transport and functional design in organic ferromagnetic devices organic ferromagnets are intriguing materials in that they combine ferromagnetic and organic properties. In this section, we discuss the electron transport through an asymmetric of chain, e. Crossover between the ballistic and diffusive regime of the.
Spindependent transport in antiferro and ferrimagnetic nanostructures. We study the spin dependent transport properties of the nanostructures consisting of realistic magnetic barriers produced by the deposition of ferromagnetic stripes on heterostructures. Spin dependent transport in magnetic nanostructures crc. Edited by two of the worlds leading authorities, spin dependent transport in magnetic nanostructures introduces and explains the basic physics and applications of a variety of spindependent transport phenomena in magnetic nanostructures with particular emphasis on. On the other hand, in the mesoscopic, nanoelectronic devices, for three. Correlations enhance the magnetoresistance effect in the incoherent sequential tunneling regime. Sahakyan the state engineering university of armenia, yerevan, armenia. The control of spin currents by an applied magnetic field was practically implemented in 1988 through the discovery of the giant magnetoresistance gmr 3, 4 effect, and since. A technology has emerged called spintronics spin transport electronics or spinbased electronics, where it is not the electron charge but the electron spin that carries information, and this offers opportunities for a new generation of devices combining standard microelectronics with spin.
Enhanced magnetic field sensitivity of spindependent transport in clusterassembled metallic nanostructures. The mean free path le is the distance that an electron travels before its initial momentum is destroyed in elastic. Coherent electronic transport through a molecular device is studied using non equilibrium greens function negf formalism. In this sense, the spincharge separation of electrons is a starting point for the physics of spinelectronics. The conductance is expressed by using the wave functions of electrons on the fermi level in the mean field theory at zero temperature. Magnetic nanostructures for lateral spintransport devices. Spin dynamics and spin transport springer tracts in modern physics 246 on free shipping on qualified orders. The extensive study of spin dependent transport began in 1988 when the giant magnetoresistive e. Second harmonic detection of spindependent transport in magnetic nanostructures article pdf available in chinese physics letters 272 february 2010 with 39 reads how we measure reads. The parameters of the model are the magnetic nonmagnetic. University of groningen spin caloritronics in magneticnon. Spin dependent transport in magnetic nanostructures is based on the physics of the interaction between spin and charge.
In magnetic superlattices, magnetic and nonmagnetic metallic thin films with thickness of the order of one nanometer are piledup alternately. In summary, these are some cluster like nanostructures. The critical temperature at which this magnetic order is lost becomes higher, if the. Regarding magnetism transition metal and rareearth atoms, metaloxydes etc. Electronic correlations in spindependent transport through. Spin transport and dynamics in multilayer magnetic. Spin dependent transport in magnetic nanostructures 1st. Spinpolarized transport in magnetic nanostructures, in particular. Radiation effects on the magnetism and the spin dependent. Cornell university 2012 this dissertation describes a number of research projects with the common theme of manipulating the magnetization of a nanoscale magnet through electrical means, and the major part is devoted to exploring the effect of spin. Spin transport in magnetic nanostructures listed as stmn. The dependence of magnetic spin and orbital moments and spin correlations on particle size and temperature are of. Magnetization manipulation in magnetic nanostructures chen wang, ph. Thermodynamic description of heat and spin transport in magnetic nanostructures.
Nov 16, 2001 until recently, the spin of the electron was ignored in mainstream chargebased electronics. Spin transport and current induced magnetization dynamics. Spindependent currents in magnetnormal metal based magnetic. Spin dependent transport in magnetic nanostructures 1st edition. Until recently, the spin of the electron was ignored in mainstream chargebased electronics. The spin transport through and near interfaces have been studied in magnetnormal metal based multilayer magnetic nanostructures in magnetostatic and magnetodynamic cases. In magnetic superlattices, magnetic and non magnetic metallic thin films with thickness of the order of one nanometer are piledup alternately. We study the spindependent transport properties of the nanostructures consisting of realistic magnetic barriers produced by the deposition of ferromagnetic stripes on heterostructures. We study the linear response theory of the electric transport in magnetic nanostructures. Its features and accompanying effects, such as the magnetoresistance or the magnetic precession induced spin pumping and spin accumulation in adjacent normal metal are. This book introduces and explains the basic physics and applications of a variety of spin dependent transport phenomena in magnetic nanostructures with particular emphasis on magnetic multilayers and. This book introduces and explains the basic physics and applications of a variety of spindependent transport phenomena in magnetic nanostructures with particular emphasis on magnetic multilayers and.
Spindependent transport in magnetic nanostructures is based on the physics of the interaction between spin and charge. Spintransport and transfer basics giant magnetoresistance gmr spin filtering and spin momentum transfer ii. The nanostructures might be favorable candidates for ferromagnetic contacts in future spininjection experiments in lateral feromagnetsemiconductor hybrid structures. Elsevier journal of magnetism and magnetic materials 156 1996 315316 invited paper iii journal of magnetism and magnetic materials spin dependent transport in magnetic nanostructures s. Giant magnetoresistance and quantum transport in magnetic. Enhanced magnetic field sensitivity of spindependent. From spin dependent conduction in ferromagnets to giant magnetoresistance.
Transport in nanostructures second edition providing a muchneeded update on the latest experimental research, this new edition has been thoroughly revised and develops a detailed theoretical framework for understanding the behavior of mesoscopic devices. An interpretation of the observed behavior is suggested based on a combination of spinorbit and magnetic impurity scattering. A second driver for the growth of the study of spintransfer effects is that experimental fabrication techniques have only recently been developed that allow devices to be readily made at the sub 100 nm dimensions. Various spindependent electrical and thermal phenomena in. Handbook of spin transport and magnetism provides a comprehensive, balanced account of the state of the art in the field known as spin electronics or spintronics. Spindependent transport in magnetic nanostructures. It is shown that, only in the nanostructures with symmetric magnetic field with respect to the magneticmodulation direction, electrons exhibit a considerable. Spindependent currents in magnetnormal metal based. Manufacture, physics, devices, and modeling, march 9, 2008 department of physics, new york university andrew d. Aguado spin transport in hybrid nanostructures, saburo takahashi and sadamichi maekawa nonlocal spin valves in metallic nano.
A technology has emerged called spintronics spin transport electronics or spin based electronics, where it is not the electron charge but the electron spin that carries information, and this offers opportunities for a new generation of devices combining standard microelectronics with spin dependent. Spin transport and current induced magnetization dynamics in. Elsevier journal of magnetism and magnetic materials 156 1996 315316 invited paper iii journal of magnetism and magnetic materials spindependent transport in magnetic nanostructures s. The emerging field of spintronics explores the many possibilities offered by the prospect of using the spin of the electrons for fast, nanosized electronic devices. In magnetic systems of nanometer size, the interplay between spin and charge of electrons provides unique transport phenomena.
Aug, 2006 enhanced magnetic field sensitivity of spin dependent transport in clusterassembled metallic nanostructures. Although the initial problem of, whether gmr was a surface or a bulk e. Spin dependent transport in nanostructures candidato dr. The occurrence of inhomogeneous spin density distribution in multilayered ferromagnetic diluted magnetic semiconductor nanostructures leads to strong. Spin dependent transport in magnetic nanostructures. The spin diffusion length is measured in situ in a mesoscopic superconducting channel and compared to that in the normal state. Handbook of spin transport and magnetism 1st edition. The interconnection between the spin current and spin dynamics via the spindependent scattering and an accompanying by spin torque effect in ferromagneticnormal metal based magnetic multilayer nanostructures is studied including a high fast outofequilibrium spin dynamics. The phenomena also depend on the geometry of the devices. Since the discovery of giant magnetoresistance gmr in these superlattices in 1988, spin dependent transport phenomena in magnetic nanostructures have received much attention from both academic and. Spindependent transport through a quantum wme with magnetic impurity 487 of spindependent transmission shown in fig. In a device containing a superconductor f1sf2, the e. The supporting information is available free of charge on the acs publications website at doi. Spindependent transport and functional design in organic.
Spinpolarized transport in ferromagnetic multilayered. Spin transport and current induced magnetization dynamics in magnetic nanostructures. Spindependent transport through an interacting quantum dot. Spindependent tunneling in nanostructures consisting of. The interconnection between the spin current and spin dynamics via the spin dependent scattering and an accompanying by spin torque effect in ferromagneticnormal metal based magnetic multilayer nanostructures is studied including a high fast outofequilibrium spin dynamics. This page intentionally left blank transport in nanostructures second edition providing a muchneeded update on the l. The spin diffusion length is measured insitu in a mesoscopic superconducting channel and compared to that in the normal state. The occurrence of inhomogeneous spindensity distribution in multilayered ferromagnetic diluted magnetic semiconductor nanostructures leads to strong. Traditional approaches to using spin are base on the alignment of a spin relative to a reference, for example an external magnetic eld. The thickness of the cclayers should be made as small as possible, provided that the magnetic coupling between the free and pinned layers is kept negligible. The second edition now contains greater coverage of the quantum hall effect, in. Spindependent transport and functional design in organic ferromagnetic devices organic ferromagnets are intriguing materials in that they combine ferromagnetic and organic properties. Spin dependent transport in magnetic nanostructures pdf. Spin transport and transfer basics giant magnetoresistance gmr spin filtering and spin momentum transfer ii.
Spindependant transport in lateral nanodevices based on. Features of the spin transport through interfaces and its impact on. Transport in nanostructures magnetic microscopy of nanostructures. A dissertation submitted to the faculty of the graduate school of the university of minnesota by xi chen in partial fulfillment of the requirements for the degree of doctor of philosophy randall h. The fourth term describes the free magnetic electrodes and the last term. The aforementioned studies of spindependent transport through of devices are limited to uniform of molecular chains. The thickness of the cclayers should be made as small as possible, provided that the magnetic coupling between the free. Spin dependent transport in magnetic nanostructures advances. It is shown that, only in the nanostructures with symmetric magnetic field with respect to the magnetic modulation direction, electrons exhibit a considerable. The sse is an effect that requires an interface between a magnetic material and a non. We present studies of a role of electronic correlations on transport through a ferromagnetic singleelectron transistor. He has recently served on the aip steering cmte for magnetic materials, and as a committee member. A second driver for the growth of the study of spin transfer effects is that experimental fabrication techniques have only recently been developed that allow devices to be readily made at the sub 100 nm dimensions.
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