The spin-motive force (SMF) in a simple ferromagnetic monolayer caused by a surface acoustic wave is studied theoretically via spin-vorticity coupling (SVC). The SMF has two mechanisms. The first is the SVC-driven SMF, which produces the first harmonic electromotive force, and the second is the interplay between the SVC and the magentoelastic coupling, which produces the d.c. and second harmonic electromotive forces. We show that these electric voltages induced by a Rayleigh-type surface acoustic wave can be detected in polycrystalline nickel. No sophisticated device structures, non-collinear magnetic structures, or strong spin-orbit materials are used in our approach. Consequently, it is intended to broaden the spectrum of SMF applications considerably.
Anisotropic spin motive force in multi-layered Dirac fermion system, $α$-(BEDT-TTF)$_2$I$_3$
本文研究了多层无质量Dirac费米子系统$α$ -(BEDT-TTF)$_2$ I $_3$中的各向异性自旋动力。在层间反铁磁相互作用和层间各向异性铁磁相互作用的假设下,我们用最速下降法数值研究了基态的自旋有序态。各向异性相互作用导致各向异性自旋有序态。我们计算了各向异性自旋织构产生的自旋动力。计算结果与实验结果定量吻合。
Generation of non-equilibrium spin-motive force at the surface of a topological insulator induced by current-driven domain wall motion in the magnetic substrate
Electron spin transport in a disordered metal is theoretically studied from the hydrodynamic viewpoint focusing on the role of electron vorticity. The spin-resolved momentum flux density of electrons is calculated taking account of the spin-orbit interaction and uniform magnetization, and the expression for the spin motive force is obtained as the linear response to a driving electric field. It is shown that the spin-resolved momentum flux density and motive force are characterized by troidal moments expressed as vector products of the applied external electric field and the spin polarization …