Hysteretic Dynamics of Domain Walls at Finite Temperatures

2001/06/14 by T. Nattermann, V. L. Pokrovsky, V. Pokrovsky +1 · 3 citations
Computer Science · Physics and Astronomy · #Magnetic properties of thin films #Nonlinear Dynamics and Pattern Formation #Theoretical and Computational Physics #cond-mat.dis-nn #cond-mat.soft

paper · pdf · doi:10.1103/physrevlett.87.197005

4 pages, 2 figures

arxiv created 2001/06/14 · openalex publication_date 2001/10/22 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Theory of domain wall motion in a random medium is extended to the case when the driving field is below the zero-temperature depinning threshold and the creep of the domain wall is induced by thermal fluctuations. Subject to an ac drive, the domain wall starts to move when the driving force exceeds an effective threshold which is temperature and frequency dependent. Similar to the case of zero temperature, the hysteresis loop displays three dynamical phase transitions at increasing ac field amplitude h(0). The phase diagram in the 3D phase space of temperature, driving force amplitude, and frequency is investigated.

Citations

• Depinning transition and thermal fluctuations in the random-field Ising model
• Hysteresis Loop Critical Exponents in 6-Epsilon Dimensions

Cited by

• Hysteresis loops of Co–Pt perpendicular magnetic multilayers
• Dynamic hysteresis from zigzag domain walls: Discrete model and Monte Carlo simulations
• Hysteretic response characteristics and dynamic phase transition via site dilution in the kinetic Ising model