Spontaneous Magnetic Superdomain Wall Fluctuations in an Artificial Antiferromagnet

X. M. Chen, B. Farmer, J. S. Woods, S. Dhuey, W. Hu, C. Mazzoli, S. B. Wilkins, R. V. Chopdekar, A. Scholl, I. K. Robinson, L. E. De Long, S. Roy, J. T. Hastings

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Collective dynamics often play an important role in determining the stability of ground states for both naturally occurring materials and metamaterials. We studied the temperature dependent dynamics of antiferromagnetically ordered superdomains in a square artificial spin lattice using soft x-ray photon correlation spectroscopy. We observed an exponential slowing down of superdomain wall motion below the antiferromagnetic onset temperature, similar to the behavior of typical bulk antiferromagnets. Using a continuous time random walk model we show that these superdomain walls undergo low-temperature ballistic and high-temperature diffusive motions.

Original languageEnglish
Article number197202
JournalPhysical Review Letters
Volume123
Issue number19
DOIs
StatePublished - Nov 6 2019

Bibliographical note

Publisher Copyright:
© 2019 American Physical Society.

ASJC Scopus subject areas

  • General Physics and Astronomy

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