Spin Transfer Dynamics in Spin Valves with Out-of-plane Magnetized CoNi Free Layers (2009)
Rippard, William H., Deac, Alina M., Pufall, Matthew R., Shaw, Justin M., Keller, Mark W., Russek, Stephen E., ...
We have measured spin transfer-induced dynamics in magnetic nanocontact devices having a perpendicularly magnetized Co/Ni free layer and an in-plane magnetized CoFe fixed layer. The frequencies and...
Thermopower and Thermally Induced Domain Wall Motion in (Ga,Mn)As (2009)
Hals, Kjetil M. D., Brataas, Arne, Bauer, Gerrit E. W.
We study two reciprocal thermal effects in the ferromagnetic semiconductor (Ga,Mn)As by scattering theory: domain wall motion induced by a temperature gradient as well as heat currents pumped by a...
Spin temperature and thermalization in spin valves (2009)
Heikkila, Tero T., Hatami, Moosa, Bauer, Gerrit E. W.
We study the concept of spin temperature in excited spin valves, more precisely the effective electron temperature that may become spin dependent, both in linear response and far from equilibrium. A...
Nanoscale Magnetic Heat Pumps and Engines (2009)
Bauer, Gerrit E. W., Bretzel, Stefan, Brataas, Arne, Tserkovnyak, Yaroslav
We present the linear response matrix for a sliding domain wall in a rotatable magnetic nanowire, which is driven out of equilibrium by temperature and voltage bias, mechanical torque, and magnetic...
Barnett Effect in Thin Magnetic Films and Nanostructures (2009)
Bretzel, Stefan, Bauer, Gerrit E. W., Tserkovnyak, Yaroslav, Brataas, Arne
The Barnett effect refers to the magnetization induced by rotation of a demagnetized ferromagnet. We describe the location and stability of stationary states in rotating nanostructures using the...
Noise and dissipation in magnetoelectronic nanostructures (2009)
Foros, Jorn, Brataas, Arne, Bauer, Gerrit E. W., Tserkovnyak, Yaroslav
We study the coupled current and magnetization noise in magnetic nanostructures by magnetoelectronic circuit theory. Spin current fluctuations, which depend on the magnetic configuration, are found...
Colored thermal voltage noise in spin valves (2009)
Xiao, Jiang, Bauer, Gerrit E. W., Maekawa, Sadamichi, Brataas, Arne
The pumping of spins by moving magnetizations is shown to introduce color on top of the thermal white noise (Johnson-Nyquist) electronic power spectrum of spin valves. The magnetization related noise...
Thermoelectric effects in magnetic nanostructures (2009)
Hatami, Moosa, Bauer, Gerrit E. W., Zhang, Qinfang, Kelly, Paul J.
We model and evaluate the Peltier and Seebeck effects in magnetic multilayer nanostructures by a finite-element theory of thermoelectric properties. We present analytical expressions for the...
Thermoelectric effects in magnetic nanostructures (2009)
Hatami, Moosa, Bauer, Gerrit E.W., Zhang, Qinfang, Kelly, Paul J.
We model and evaluate the Peltier and Seebeck effects in magnetic multilayer nanostructures by a finite-element theory of thermoelectric properties. We present analytical expressions for the...
Spin accumulation with spin-orbit interaction (2008)
Saarikoski, Henri, Bauer, Gerrit E. W.
Spin accumulation is a crucial but imprecise concept in spintronics. In metal-based spintronics it is characterized in terms of semiclassical distribution functions. In semiconductors with a strong...
Scattering Theory of Gilbert Damping (2008)
Brataas, Arne, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W.
The magnetization dynamics of a single domain ferromagnet in contact with a thermal bath is studied by scattering theory. We recover the Landau-Liftshitz-Gilbert equation and express the effective...
Current-induced noise and damping in non-uniform ferromagnets (2008)
Foros, Jorn, Brataas, Arne, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W.
In the presence of spatial variation of the magnetization direction, electric current noise causes a fluctuating spin-transfer torque that increases the fluctuations of the ferromagnetic order...
Proximity effect-assisted absorption of spin currents in superconductors (2007)
Morten, Jan Petter, Brataas, Arne, Bauer, Gerrit E. W., Belzig, Wolfgang, Tserkovnyak, Yaroslav
The injection of pure spin current into superconductors by the dynamics of a ferromagnetic contact is studied theoretically. Taking into account suppression of the order parameter at the interfaces...
Theory of current-driven magnetization dynamics in inhomogeneous ferromagnets (2007)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
We give a brief account of recent developments in the theoretical understanding of the interaction between electric currents and inhomogeneous ferromagnetic order parameters. We start by discussing...
Thermal Spin-Transfer Torques in Magnetoelectronic Devices (2007)
Hatami, Moosa, Bauer, Gerrit E. W., Zhang, Qinfang, Kelly, Paul J.
We predict that the magnetization direction of a ferromagnet can be reversed by the spin-transfer torque accompanying spin-polarized thermoelectric heat currents. We illustrate the concept by...
Magnetization damping in a local-density approximation (2006)
Skadsem, Hans Joakim, Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
The linear response of itinerant transition metal ferromagnets to transverse magnetic fields is studied in a self-consistent adiabatic local-density approximation. The susceptibility is calculated...
Kovalev, Alexey A., Bauer, Gerrit E. W., Brataas, Arne
We study theoretically the detection and possible utilization of electric current-induced mechanical torques in ferromagnetic-normal metal heterostructures that are generated by spin-flip scattering...
Exchange effects on electron transport through single-electron spin-valve transistors (2006)
Wetzels, Wouter, Bauer, Gerrit E. W., Grifoni, Milena
We study electron transport through single-electron spin-valve transistors in the presence of non-local exchange between the ferromagnetic leads and the central normal-metal island. The Coulomb...
Voltage generation by ferromagnetic resonance (2006)
Wang, Xuhui, Bauer, Gerrit E. W., Van Wees, Bart J., Brataas, Arne, Tserkovnyak, Yaroslav
A ferromagnet can resonantly absorbs rf radiation to sustain a steady precession of the magnetization around an internal or applied magnetic field. We show that under these ferromagnetic resonance...
Detection of current-induced spins by ferromagnetic contacts (2006)
Adagideli, Inanc, Bauer, Gerrit E. W., Halperin, Bertrand I.
Detection of current-induced spin accumulation via ferromagnetic contacts is discussed. Onsager's relations forbid that in a two-probe configuration spins excited by currents in time-reversal...
Resistance noise in spin valves (2006)
Foros, Jorn, Brataas, Arne, Bauer, Gerrit E. W., Tserkovnyak, Yaroslav
Fluctuations of the magnetization in spin valves are shown to cause resistance noise that strongly depends on the magnetic configuration. Due to the applied external field and the dynamic exchange...
Inoue, Jun-ichiro, Kato, Takashi, Ishikawa, Yasuhito, Itoh, Hiroyoshi, Bauer, Gerrit E. W., Molenkamp, Laurens W.
We study the effect of disorder on the intrinsic anomalous Hall (AH) conductivity in a spin-polarized two-dimensional electron gas with a Rashba-type spin-orbit interaction. We find that AH...
Non-collinear Magnetoelectronics (2006)
Brataas, Arne, Bauer, Gerrit E. W., Kelly, Paul J.
The electron transport properties of hybrid ferromagnetic|normal metal structures such as multilayers and spin valves depend on the relative orientation of the magnetization direction of the...
Dynamics of thin-film spin-flip transistors with perpendicular source-drain magnetizations (2006)
Wang, Xuhui, Bauer, Gerrit E. W., Hoffmann, Axel
A "spin-flip transistor" is a lateral spin valve consisting of ferromagnetic source drain contacts to a thin-film normal-metal island with an electrically floating ferromagnetic base contact on top....
Current-controlled magnetization dynamics in the spin-flip transistor (2006)
Wang, Xuhui, Bauer, Gerrit E. W., Ono, Teruo
The current driven magnetization dynamics of a thin-film, three magnetic terminal device (spin-flip transistor) is investigated theoretically. We consider a magnetization configuration in which all...
Current-induced magnetization dynamics in disordered itinerant ferromagnets (2005)
Tserkovnyak, Yaroslav, Skadsem, Hans Joakim, Brataas, Arne, Bauer, Gerrit E. W.
Current-driven magnetization dynamics in ferromagnetic metals are studied in a self-consistent adiabatic local-density approximation in the presence of spin-conserving and spin-dephasing impurity...
Magnetomechanical Torques in Small Magnetic Cantilevers (2005)
Kovalev, Alexey A., Bauer, Gerrit E. W., Brataas, Arne
We study the dnamics of small magnetic cantilevers, either made from Si covered by a magnetic film or entirely ferromagnetic ones. The magnetomechanical torques are found to cause line splittings in...
Efficient Magnetization Reversal with Noisy Currents (2005)
Wetzels, Wouter, Bauer, Gerrit E. W., Jouravlev, Oleg N.
We propose to accelerate reversal of the ferromagnetic order parameter in spin valves by electronic noise. By solving the stochastic equations of motion we show that the current-induced magnetization...
Noncollinear single-electron spin-valve transistors (2005)
Wetzels, Wouter, Bauer, Gerrit E. W., Grifoni, Milena
We study interaction effects on transport through a small metallic cluster connected to two ferromagnetic leads (a single-electron spin-valve transistor) in the “orthodox model” for the Coulomb...
Intrinsic Spin Hall Edges (2005)
Adagideli, Inanc, Bauer, Gerrit E. W.
The prediction of intrinsic spin Hall currents by Murakami \textit{et al.} and Sinova \textit{et al.} raised many questions about methods of detection and the effect of disorder. We focus on a...
Perpendicular spin valves with ultra-thin ferromagnetic layers (2005)
Kovalev, Alexey A., Bauer, Gerrit E. W., Brataas, Arne
We address two finite size effects in perpendicular transport through magnetic multilayers. When the magnetic layer thickness in spin valves becomes of the order or smaller than the spin-flip...
Non-collinear single-electron spin-valve transistors (2005)
Wetzels, Wouter, Bauer, Gerrit E. W., Grifoni, Milena
We study interaction effects on transport through a small metallic cluster connected to two ferromagnetic leads (a single-electron spin-valve transistor) in the "orthodox model" for the Coulomb...
Spin accumulation and decay in magnetic Schottky barriers (2005)
Bauer, Gerrit E. W., Tserkovnyak, Yaroslav, Brataas, Arne, Ren, Jun, Xia, Ke, Zwierzycki, Maciej, ...
The theory of charge and spin transport in forward-biased Schottky barriers reveals characteristic and experimentally relevant features. The conductance mismatch is found to enhance the current...
Current-induced macrospin vs spin-wave excitations in spin valves (2005)
Brataas, Arne, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W.
The mode dependence of current-induced magnetic excitations in spin valves is studied theoretically. The torque exerted on the magnetization by transverse spin currents as well as the Gilbert damping...
Magnetization noise in magnetoelectronic nanostructures (2005)
Foros, Jorn, Brataas, Arne, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W.
By scattering theory we show that spin current noise in normal electric conductors in contact with nanoscale ferromagnets increases the magnetization noise by means of a fluctuating spin-transfer...
Nonlocal magnetization dynamics in ferromagnetic heterostructures (2004)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W., Halperin, Bertrand I.
Two complementary effects modify the GHz magnetization dynamics of nanoscale heterostructures of ferromagnetic and normal materials relative to those of the isolated magnetic constituents: On the one...
Reducing the critical switching current in nanoscale spin valves (2004)
Manschot, Jan, Brataas, Arne, Bauer, Gerrit E. W.
The current induced magnetization reversal in nanoscale spin valves is a potential alternative to magnetic field switching in magnetic memory devices. We show that the critical switching current can...
Suppression of the Persistent Spin Hall Current by Defect Scattering (2004)
Inoue, Jun-ichiro, Bauer, Gerrit E. W., Molenkamp, Laurens W.
We study the linear response spin Hall conductivity of a two-dimensional electron gas (2DEG) in the presence of the Rashba spin orbit interaction in the diffusive transport regime. When defect...
Dynamic ferromagnetic proximity effect in photoexcited semiconductors (2003)
Bauer, Gerrit E. W., Brataas, Arne, Tserkovnyak, Yaroslav, Halperin, Bertrand I., Zwierzycki, Maciej, Kelly, Paul J.
The spin dynamics of photoexcited carriers in semiconductors in contact with a ferromagnet is treated theoretically and compared with time-dependent Faraday rotation experiments. The long time...
Non-monotonic angular magnetoresistance in asymmetric spin valves (2003)
Manschot, Jan, Brataas, Arne, Bauer, Gerrit E. W.
The electric resistance of ferromagnet/normal-metal/ferromagnet perpendicular spin valves depends on the relative angle between the magnetization directions. In contrast to common wisdom, this...
Magnetoelectronic Spin Echo (2003)
Brataas, Arne, Zarand, Gergely, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W.
We predict a spin echo in electron transport through layered ferromagnetic-normal-ferromagnetic metal structures: whereas a spin current polarized perpendicular to the magnetization direction decays...
The spin-torque transistor (2003)
Bauer, Gerrit E. W., Brataas, Arne, Tserkovnyak, Yaroslav, Van Wees, Bart J.
A magnetoelectronic thin-film transistor is proposed that can display negative differential resistance and gain. The working principle is the modulation of the soure-drain current in a spin valve by...
Bauer, Gerrit E. W., Tserkovnyak, Yaroslav, Huertas-Hernando, Daniel, Brataas, Arne
Magnetoelectronics is mainly digital, i.e. governed by up and down magnetizations. In contrast, analogue magnetoelectronics makes use of phenomena occuring for non-collinear magnetization...
Dynamic exchange coupling and Gilbert damping in magnetic multilayers (2003)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
We theoretically study dynamic properties of thin ferromagnetic films in contact with normal metals. Moving magnetizations cause a flow of spins into adjacent conductors, which relax by spin flip,...
Magnetovibrational coupling in small cantilevers (2003)
Kovalev, Alexey A., Bauer, Gerrit E. W., Brataas, Arne
A nano-magnetomechanical system consisting of a cantilever and a thin magnetic film is predicted to display magnetovibrational modes, which should enable applications for sensors and actuators. The...
Dynamic stiffness of spin valves (2002)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
The dynamics of the magnetic order parameters of ferromagnet/normal-metal/ferromagnet spin valves and isolated ferromagnets may be very different. We investigate the role of the nonequilibrium...
Diffuse transport and spin accumulation in a Rashba two-dimensional electron gas (2002)
Inoue, Jun-ichiro, Bauer, Gerrit E. W., Molenkamp, Laurens W.
The Rashba Hamiltonian describes the splitting of the conduction band as a result of spin-orbit coupling in the presence of an asymmetric confinement potential and is commonly used to model the...
Dynamic exchange coupling in magnetic bilayers (2002)
Heinrich, Bret, Tserkovnyak, Yaroslav, Woltersdorf, Georg, Brataas, Arne, Urban, Radovan, Bauer, Gerrit E. W.
A long-ranged dynamic interaction between ferromagnetic films separated by normal-metal spacers is reported, which is communicated by nonequilibrium spin currents. It is measured by ferromagnetic...
Spin pumping and magnetization dynamics in metallic multilayers (2002)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
We study the magnetization dynamics in thin ferromagnetic films and small ferromagnetic particles in contact with paramagnetic conductors. A moving magnetization vector causes \textquotedblleft...
Spin-transfer in diffusive ferromagnet-normal metal systems with spin-flip scattering (2002)
Kovalev, Alexey, Brataas, Arne, Bauer, Gerrit E. W.
The spin-transfer in biased disordered ferromagnet (F) - normal metal (N) systems is calculated by the diffusion equation. For F1-N2-F2 and N1-F1-N2-F2-N3 spin valves, the effect of spin-flip...
Scattering theory of interface resistance in magnetic multilayers (2002)
Bauer, Gerrit E. W., Schep, Kees M., Xia, Ke, Kelly, Paul J.
The scattering theory of transport has to be applied with care in a diffuse environment. Here we discuss how the scattering matrices of heterointerfaces can be used to compute interface resistances...
Universal angular magnetoresistance and spin torque in ferromagnetic/normal metal hybrids (2002)
Bauer, Gerrit E. W., Tserkovnyak, Yaroslav, Huertas-Hernando, Daniel, Brataas, Arne
The electrical resistance of ferromagnetic/normal-metal (F/N) heterostructures depends on the nature of the junctions which may be tunnel barriers, point contacts, or intermetallic interfaces. For...
Spin battery operated by ferromagnetic resonance (2002)
Brataas, Arne, Tserkovnyak, Yaroslav, Bauer, Gerrit E. W., Halperin, Bertrand I.
Precessing ferromagnets are predicted to inject a spin current into adjacent conductors via Ohmic contacts, irrespective of a conductance mismatch with, for example, doped semiconductors. This opens...
Enhanced Gilbert Damping in Thin Ferromagnetic Films (2001)
Tserkovnyak, Yaroslav, Brataas, Arne, Bauer, Gerrit E. W.
Using a scattering matrix approach, the precession of the magnetization of a ferromagnet is shown to transfer spins into adjacent normal metal layers. This ``pumping'' of spins slows down the...
Dynamics of classical wave scattering by small obstacles (2001)
Bauer, Gerrit E. W., Ferreira, Mauro S., Wapenaar, Cees P. A.
A causality problem in the time-dependent scattering of classical waves from point scatterers is pointed out and analyzed. Based on an alternative model, the leading pole approximation of the exact...
Theory of Angular Magnetoresistance in CPP spin valves (2001)
Huertas-Hernando, Daniel, Bauer, Gerrit E. W., Nazarov, Yu. V.
The resistance of CPP spin valve is a continuous function of the angle $\theta $ between the magnetizations of both ferromagnets. We use the cicuit theory for non-collinear magnetoelectronics to...
The Rashba Hamiltonian and electron transport (2001)
Molenkamp, Laurens W., Schmidt, Georg, Bauer, Gerrit E. W.
The Rashba Hamiltonian describes the splitting of the conduction band as a result of spin-orbit coupling in the presence of an external field and is commonly used to model the electronic structure of...
Bauer, Gerrit E. W., Nazarov, Yuli V., Brataas, Arne
The recently developed semiclassical theory for magnetoelectronic circuits is applied to a transistor-like device consisting of a normal metal island and three magnetic terminals. The electric...
Dynamics of Classical Wave Scattering by Small Obstacles (2001)
Bauer, Gerrit E. W., Ferreira, Mauro S., Wapenaar, Cees P. A.
Semiclassical Concepts in Magnetoelectronics (2000)
Bauer, Gerrit E. W., Nazarov, Yuli V., Huertas-Hernando, Daniel, Brataas, Arne, Xia, Ke, Kelly, Paul J.
Semiclassical theories of electron and spin transport in metallic magnetic structures are reviewed with emphasis on the role of disorder and electronic band structures in the current perpendicular to...
Strong Effects of Weak Localization in Charge Density Wave/Normal Metal Hybrids (2000)
Visscher, Mark I., Rejaei, Behzad, Bauer, Gerrit E. W.
Collective transport through a multichannel disordered conductor in contact with charge-density-wave electrodes is theoretically investigated. The statistical distribution function of the threshold...
Huertas-Hernando, Daniel, Nazarov, Yu. V., Brataas, Arne, Bauer, Gerrit E. W.
We study diffusive transport through ferromagnet - normal metal - ferromagnet (F-N-F) systems, with arbitrary but fixed magnetization directions of the ferromagnetic reservoirs and orientations of a...
Negative Domain Wall Resistance in Ferromagnets (1999)
Van Gorkom, R. P., Brataas, Arne, Bauer, Gerrit E. W.
The electrical resistance of a diffusive ferromagnet with magnetic domain walls is studied theoretically, taking into account the spatial dependence of the magnetization. The semiclassical domain...
Scattering theory of the Johnson spin transistor (1999)
Geux, Linda S., Brataas, Arne, Bauer, Gerrit E. W.
We discuss a simple, semiclassical scattering theory for spin-dependent transport in a many-terminal formulation, with special attention to the four terminal device of Johnson referred to as spin...
Finite-element theory of transport in ferromagnet-normal metal systems (1999)
Brataas, Arne, Nazarov, Yu. V., Bauer, Gerrit E. W.
We formulate a theory of spin dependent transport of an electronic circuit involving ferromagnetic elements with non-collinear magnetizations which is based on the conservation of spin and charge...
Charge Density Wave Ratchet (1999)
Visscher, Mark I., Bauer, Gerrit E. W
We propose to operate a locally-gated charge density wave as an electron pump. Applying an oscillating gate potential with frequency $f$ causes equally spaced plateaux in the sliding charge density...
Ballistic and diffuse transport through a ferromagnetic domain wall (1999)
Brataas, Arne, Tatara, Gen, Bauer, Gerrit E. W.
We study transport through ballistic and diffuse ferromagnetic domain walls in a two-band Stoner model with a rotating magnetization direction. For a ballistic domain wall, the change in the...
Spin-accumulation in small ferromagnetic double barrier junctions (1998)
Brataas, Arne, Nazarov, Yu. V., Inoue, J., Bauer, Gerrit E. W.
The non-equilibrium spin accumulation in ferromagnetic double barrier junctions is shown to govern the transport in small structures. Transport properties of such systems are described by a...
Ballistic electron transport through magnetic domain walls (1998)
Schep, Kees M., Brataas, Arne, Bauer, Gerrit E. W., Kelly, Paul J.
Electron transport limited by the rotating exchange-potential of domain walls is calculated in the ballistic limit for the itinerant ferromagnets Fe, Co, and Ni. When realistic band structures are...