Symmetry-broken <i>dissipative exchange flows</i> in thin-film ferromagnets with in-plane anisotropy.

ABSTRACT: Planar ferromagnetic channels have been shown to theoretically support a long-range ordered and coherently precessing state where the balance between local spin injection at one edge and damping along the channel establishes a dissipative exchange flow, sometimes referred to as a spin superfluid. However, realistic materials exhibit in-plane anisotropy, which breaks the axial symmetry assumed in current theoretical models. Here, we study dissipative exchange flows in a ferromagnet with in-plane anisotropy from a dispersive hydrodynamic perspective. Through the analysis of a boundary value problem for a damped sine-Gordon equation, dissipative exchange flows in a ferromagnetic channel can be excited above a spin current threshold that depends on material parameters and

SUBMITTER: Iacocca E 

PROVIDER: S-EPMC11520458 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature