Spin-Currents and Spin-Pumping Forces for Spintronics

Abstract

A general definition of the Spintronics concept of spin-pumping is proposed as generalized forces conjugated to the spin degrees of freedom in the framework of the theory of mesoscopic non-equilibrium thermodynamics. It is shown that at least three different kinds of spin-pumping forces and associated spin-currents can be defined in the most simple spintronics system (the Ferromagnetic/Non-Ferromagnetic metal interface). Furthermore, the generalized force associated to the ferromagnetic collective variable is also introduced in an equal footing, in order to describe the coexistence of the spin of the conduction electrons (paramagnetic spins attached to $s$-band electrons) and the ferromagnetic-order parameter. The dynamical coupling between these two kinds of magnetic degrees of freedom is presented, and interpreted in terms of spin-transfer effects.

18 pages, 2 figures

References in corpus (12)

• Non-collinear Magnetoelectronics
• Thermal Spin-Transfer Torques in Magnetoelectronic Devices
• Coherent spin transport through a 350-micron-thick Silicon wafer
• Mott Relation for Anomalous Hall and Nernst effects in Ga1-xMnxAs Ferromagnetic Semiconductors
• Magnetization dynamics in the inertial regime: nutation predicted at short time scales
• Identification of transverse spin currents in noncollinear magnetic structures
• Spin Pumping of Current in Non-Uniform Conducting Magnets
• Equilibrium spin currents in the Rashba medium
• Anisotropic Magneto-Thermopower: the Contribution of Interband Relaxation
• Spin-transfer in an open ferromagnetic layer: from negative damping to effective temperature
• Magnetization reversal driven by spin-injection : a mesoscopic spin-transfer effect
• Non-equilibrium thermodynamic study of magnetization dynamics in the presence of spin-transfer torque

Cited by in corpus (7)

• Anisotropic magneto-thermal transport and Spin-Seebeck effect
• Thermodynamic restrictions on linear reversible and irreversible thermo-electro-magneto-mechanical processes
• Spin-accumulation capacitance and its application to magnetoimpedance
• Conditions for the generation of spin currents in spin-Hall devices
• Variational approach to the stationary spin-Hall effect
• An alternative to the spin-coupled interface resistance for describing heat generation
• Mechanisms of spin-dependent heat generation in spin valves