Enhancement of Spin Currents in a Lattice near the Curie Point

Abstract

We show that pure spin currents carried by conduction electrons injected into a paramagnetic lattice of mutually interacting localized magnetic moments can be enhanced close to the Curie temperature by the exchange interaction between the lattice sites and the non vanishing spin density associated with the spin current. The latter partially aligns the magnetic moments of the lattice, generating a flow of paramagnons that contribute to the total spin current.

References in corpus (4)

• Enhancement of Thermally Injected Spin Current through an Antiferromagnetic Insulator
• Electronic control of the spin-wave damping in a magnetic insulator
• Strong enhancement of the spin Hall effect by spin fluctuations near the Curie point of FexPt1-x alloys
• The spin Hall effect as a probe of nonlinear spin fluctuations