Ab initio magnetoresistance in magnetic domain walls

J. B.A.N. Van Hoof, K. M. Schep, P. J. Kelly, G. E.W. Bauer

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The effect of magnetic domain walls on the resistance of a ferromagnet is an open problem in the sense that a consistent picture concerning the magnitude and the microscopic origin is still lacking. In this paper we present ab initio calculations of the specular transmission through domain walls in nickel, cobalt and iron. We show that for domain walls with realistic thicknesses, the effect of the domain wall on the conductance (as measured in a point-contact geometry) is indeed small but non-vanishing, in agreement with the recent experiments of Gregg et al. [Phys. Rev. Lett. 77 (1996) 1580]. The change in the conductance due to the domain wall is entirely attributable to the change in the electronic band structure of the ferromagnet brought about by the magnetization rotation. For a given total rotation (e.g. a 180° wall), a strong increase with decreasing wall thickness is predicted.

Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 1
DOIs
Publication statusPublished - 1998 Jan
Externally publishedYes

Keywords

  • Domain wall
  • Electrical transport
  • Electronic structure
  • Magnetic structure - non-collinear
  • Magnetoresistance - theory

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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