Universal depinning transition of domain walls in ultrathin ferromagnets

R. Diaz Pardo, W. Savero Torres, A. B. Kolton, S. Bustingorry, and V. Jeudy
Phys. Rev. B 95, 184434 – Published 30 May 2017

Abstract

We present a quantitative and comparative study of magnetic-field-driven domain-wall depinning transition in different ferromagnetic ultrathin films over a wide range of temperature. We reveal a universal scaling function accounting for both drive and thermal effects on the depinning transition, including critical exponents. The consistent description we obtain for both the depinning and subthreshold thermally activated creep motion should shed light on the universal glassy dynamics of thermally fluctuating elastic objects pinned by disordered energy landscapes.

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  • Received 26 November 2016

DOI:https://doi.org/10.1103/PhysRevB.95.184434

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsNonlinear Dynamics

Authors & Affiliations

R. Diaz Pardo1, W. Savero Torres1, A. B. Kolton2, S. Bustingorry2, and V. Jeudy1,*

  • 1Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR8502, 91405 Orsay, France
  • 2CONICET, Centro Atómico Bariloche, 8400 San Carlos de Bariloche, Río Negro, Argentina

  • *vincent.jeudy@u-psud.fr

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Vol. 95, Iss. 18 — 1 May 2017

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