Matthew R. Sears

Spin accumulation at ferromagnet/nonmagnetic material interfaces

Many proposed and realized spintronic devices involve spin injection and accumulation at an interface between a ferromagnet and a non-magnetic material. We examine the electric field, voltage profile, charge distribution, spin fluxes, and spin accumulation at such an interface. We include the effects of both screening and spin scattering. We also include both the spin-dependent chemical potentials {\mu}_{\uparrow,\downarrow} and the effective magnetic field H* that is zero in equilibrium. For a Co/Cu interface, we find that the spin accumulation in the copper is an order of magnitude larger when both chemical potential and effective magnetic field are included. We also show that screening contributes to the spin accumulation in the ferromagnet; this contribution can be significant.

Thermal equilibration and thermally induced spin currents in a thin-film ferromagnet on a substrate

Recent spin-Seebeck experiments on thin ferromagnetic films apply a temperature difference

Andreev-Lifshitz hydrodynamics applied to an ordinary solid under pressure

\Delta T_{x}

Generation efficiencies for propagating modes in a supersolid

along the length

Andreev-Lifshitz supersolid hydrodynamics including the diffusive mode

x

Irreversible thermodynamics of transport across interfaces

and measure a (transverse) voltage difference

Current Flow in Uniform Ferromagnets: Bulk and Surface Heating Rates

\Delta V_{y}

Two Exponentials Associated with Temperature in Spin-Seebeck Effect Geometry

along the width

Andreev-Lifshitz Theory Applied to Normal Solids under Pressure

y

Consistent asymptotic expansion of Mott's solution for oxide growth

. The connection between these effects is complex, involving: (1) thermal equilibration between sample and substrate; (2) spin currents along the height (or thickness)