Curvature effects on phase transitions in chiral magnets
Kostiantyn Yershov, Volodymyr Kravchuk, Denis Sheka, Ulrich Roessler
Abstract
Periodical equilibrium states of magnetization exist in chiral ferromagnetic films, if the constant of antisymmetric exchange (Dzyaloshinskii–Moriya interaction) exceeds some critical value. Here, we demonstrate that this critical value can be significantly modified in curved film. The competition between symmetric and antisymmetric exchange interactions in a curved film can lead to a new type of domain wall which is inclined with respect to the cylinder axis. The wall structure is intermediate between Bloch and Néel ones. The exact analytical solutions for phase boundary curves and the new domain wall are obtained.
Topics & Concepts
Antisymmetric relationDomain wall (magnetism)Condensed matter physicsFerromagnetismMagnetizationCurvaturePhysicsConstant (computer programming)Phase transitionDomain (mathematical analysis)Phase (matter)Boundary value problemMagnetCylinderMagnetic domainBoundary (topology)Classical mechanicsNegative curvatureConstant curvatureMicromagneticsInstabilityType (biology)Exchange interactionGaussian curvaturePhase boundaryMagnetic properties of thin filmsMultiferroics and related materialsAdvanced Condensed Matter Physics