Axisymmetric magneto-plastic evolution of neutron-star crusts

Magnetic field evolution in neutron-star crusts is driven by the Hall effect and Ohmic dissipation, for as long crust sufficiently strong to absorb Maxwell stresses exerted thus make momentum equation redundant. For strongest fields, however, build point of crustal failure, at which standard equations are no longer valid. Here, we study magnetic up beyond whence begins flow plastically. We perform global axisymmetric evolutions, exploring different types failure affecting a limited region crust. find that plastic does not simply suppress even regime low viscosity, but it rather leads non-trivial -- some cases overreacting enhancing impact effect. Its more pronouced toroidal field, with differences on poloidal being less substantial. argue both nature magnetar bursts their spindown will be affected flow, so observations these phenomena may help constrain way fails.