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Peer-reviewedCC BY 4.0Physical Review B

Crossover from universal depinning to free domain-wall dynamics in thin iron garnet films

  • V. Jeudy
  • D. Gouéré
  • N. Beaulieu
  • S. Husain
  • R. Díaz Pardo
  • A. Thiaville
  • João Sampaio
  • J.-M. George
  • A. Anane
  • J. Ben Youssef
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Abstract

Magnetic domain walls display universal, disorder-controlled elastic dynamics at low drive, and texture-governed free motion at high drive. Here, we establish the crossover mechanism between these two regimes. Using experiments in thin epitaxial iron garnet films and Landau-Lifshitz-Gilbert simulations, including disorder, thermal, and internal texture effects, we uncover a disorder- and temperature-dependent precessional flow that bridges pinned and free dynamics. We further demonstrate that the exceptionally low pinning in garnets arises from the weak coupling between domain walls and disorder, together with a correlation length that exceeds the wall width.

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Cite

BibTeXRIS
BibTeX
@article{jeudy2026crossover,
  title = {{Crossover from universal depinning to free domain-wall dynamics in thin iron garnet films}},
  author = {V. Jeudy and D. Gouéré and N. Beaulieu and S. Husain and R. Díaz Pardo and A. Thiaville and João Sampaio and J.-M. George and A. Anane and J. Ben Youssef},
  journal = {Physical Review B},
  year = {2026},
  month = may,
  doi = {10.1103/tg8g-h83k},
  eprint = {2512.04672},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05760488v1},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Crossover from universal depinning to free domain-wall dynamics in thin iron garnet films
AU  - V. Jeudy
AU  - D. Gouéré
AU  - N. Beaulieu
AU  - S. Husain
AU  - R. Díaz Pardo
AU  - A. Thiaville
AU  - João Sampaio
AU  - J.-M. George
AU  - A. Anane
AU  - J. Ben Youssef
PY  - 2026
DA  - 2026/05/12
JO  - Physical Review B
DO  - 10.1103/tg8g-h83k
UR  - https://hal.science/hal-05760488v1
AB  - Magnetic domain walls display universal, disorder-controlled elastic dynamics at low drive, and texture-governed free motion at high drive. Here, we establish the crossover mechanism between these two regimes. Using experiments in thin epitaxial iron garnet films and Landau-Lifshitz-Gilbert simulations, including disorder, thermal, and internal texture effects, we uncover a disorder- and temperature-dependent precessional flow that bridges pinned and free dynamics. We further demonstrate that the exceptionally low pinning in garnets arises from the weak coupling between domain walls and disorder, together with a correlation length that exceeds the wall width.
SN  - 2469-9950
SN  - 2469-9969
ER  -