Antiferromagnetic and ferromagnetic spintronics: spin transport in the two-dimensional ferromagnet and the role of in-chain and inter-chain interactions*

The spintronics demands the  spin transport study, where the spin current plays a central role in order of spintronics phenomena to occur  in magnetic materials and also in various other materials including semiconductors and oxides. [1,2]

Spin-transport and current-induced torques in ferromagnet heterostructures given by a ferromagnetic domain wall are investigated.[3] Furthermore, the continuum spin conductivity is studied in a frustrated spin system given by the Heisenberg model with ferromagnetic in-chain interaction J₁ < 0 between nearest neighbors and antiferromagnetic next-nearest-neighbor in-chain interaction J₂ > 0  with aim to investigate the effect of the phase diagram of the critical ion single anisotropy D_c as a function of J₂ on conductivity. We consider the model with the moderate strength of the frustrating parameter such that in-chain spin-spin correlations that are predominantly ferromagnetic. In addition, we consider two inter-chain couplings J_perp,y and J_perp,z corresponding to the two axes perpendicular to chain where ferromagnetic as well as antiferromagnetic interactions are taken into account.