Pinning theory of domain walls in helical magnets

Abstract

The theory of elasticity and pinning of domain walls in helical magnets is presented. Domain walls perpendicular to the helical axis show non-local elasticity and are marginally pinned by local disorder. Weak anisotropy combined with magnetic dilution leads however to a non-local bulk pinning effect. Domain walls with other orientations include generically vortex arrays, similar to type-II superconductors. Their pinning force is calculated as a function of wall orientation, pitch angle and impurity concentration. It is shown that metastable domains can vary between needle and pancake like shape.

The paper has been withdrawn due to change of format and some corrections

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• Microscopic approach to current-driven domain wall dynamics
• Collinear-to-Spiral Spin Transformation without Changing Modulation Wavelength upon Ferroelectric Transition in Tb1-xDyxMnO3
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Cited by in corpus (1)

• Current Induced Vortex Wall Dynamics in Helical Magnetic Systems