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Microscopic observation of nonergodic states in two-dimensional nontopological bubble lattices

S. Pylypenko1,*,†, M. Winter2,3,*,‡, U. K. Rößler1, D. Pohl3, R. Kyrychenko1, M. C. Rahn4,5, B. Achinuq6, J. R. Bollard6,7, P. Vir2 et al.

G. van der Laan7, T. Hesjedal6,7, J. Schultz1, B. Rellinghaus3, C. Felser2,8, and A. Lubk1,9,§

  • *These authors contributed equally to this work.
  • †Contact author: s.pylypenko@ifw-dresden.de
  • ‡Contact author: Moritz.Winter@cpfs.mpg.de
  • §Contact author: a.lubk@ifw-dresden.de
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Phys. Rev. B 112, 214424 – Published 11 December, 2025

DOI: https://doi.org/10.1103/ccxm-l6hx

Abstract

Disordered two-dimensional (2D) lattices, including hexatic and various glassy states, are observed in a wide range of 2D systems including colloidal nanoparticle assemblies and fluxon lattices. Their disordered nature determines the stability and mobility of these systems, as well as their response to the external stimuli. Here we report on the controlled creation and characterization of a disordered 2D lattice of nontopological magnetic bubbles in the noncentrosymmetric ferrimagnetic alloy Mn1.4PtSn. By analyzing the type and frequency of fundamental lattice defects, such as dislocations, the orientational correlation, as well as the induced motion of the lattice in an external field, a nonergodic glassy state, stabilized by directional application of an external field, is revealed.

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synopsis

Rafts of Magnetic Bubbles Adopt Glassy States

Published 11 December, 2025

A magnetic field coaxes nanoscale magnetic domains into a disordered 2D lattice.

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Outline

Information

Phys. Rev. B 112, 214424– Published 11 December, 2025
  • Received 24 March 2025
  • Revised 14 October 2025
  • Accepted 20 October 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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