Stripe width and nonlocal domain walls in the two-dimensional dipolar frustrated Ising ferromagnet

Alessandro Vindigni, Niculin Saratz, Oliver Portmann, Danilo Pescia, and Paolo Politi
Phys. Rev. B 77, 092414 – Published 28 March 2008

Abstract

We describe a type of magnetic domain wall that, in contrast to Bloch or Néel walls, is nonlocalized and, in a certain temperature range, nonmonotonic. The wall appears as a mean-field solution of the two-dimensional ferromagnetic Ising model frustrated by a long-ranged dipolar interaction. We provide experimental evidence of this wall delocalization in the stripe-domain phase of perpendicularly magnetized ultrathin magnetic films. In agreement with experimental results, we find that the stripe width decreases with increasing temperature and approaches a finite value at the Curie temperature following a power law. The same kind of wall and a similar temperature dependence of the stripe width are expected in the mean-field approximation of the two-dimensional Coulomb frustrated Ising ferromagnet.

  • Figure
  • Figure
  • Figure
  • Received 21 February 2008

DOI:https://doi.org/10.1103/PhysRevB.77.092414

©2008 American Physical Society

Authors & Affiliations

Alessandro Vindigni1, Niculin Saratz1, Oliver Portmann1, Danilo Pescia1, and Paolo Politi2

  • 1Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
  • 2Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 77, Iss. 9 — 1 March 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×