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Multiple energy scales in mesospin systems: The vertex-frustrated Saint George lattice
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.ORCID iD: 0000-0002-1527-8668
Univ Iceland, Sci Inst, Reykjavik, Iceland..
Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA..
Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England..
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2021 (English)In: Physical Review Materials, E-ISSN 2475-9953, Vol. 5, no 11, article id 114410Article in journal (Refereed) Published
Abstract [en]

The interplay between topology and energy hierarchy plays a vital role in the collective magnetic order in artificial ferroic systems. Here we investigate, experimentally, the effect of having one or two activation energies of interacting Ising-like magnetic islands—mesospins—in thermalized, vertex-frustrated lattices. The thermally arrested magnetic states of the elements were determined using synchrotron-based magnetic microscopy after cooling the samples from temperatures above the Curie temperature of the material. Statistical analysis of the correlations between mesospins across several length scales reveals changes in the magnetic order, reflecting the amount of ground state plaquettes realized for a vertex-frustrated lattice. We show that the latter depends on the presence, or not, of different activation energies.

Place, publisher, year, edition, pages
American Physical Society (APS) American Physical Society, 2021. Vol. 5, no 11, article id 114410
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Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-461730DOI: 10.1103/PhysRevMaterials.5.114410ISI: 000725486200001OAI: oai:DiVA.org:uu-461730DiVA, id: diva2:1633724
Funder
Knut and Alice Wallenberg Foundation, 2015.0060Swedish Research Council, 2019-03581Available from: 2022-01-31 Created: 2022-01-31 Last updated: 2024-01-15Bibliographically approved

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Stopfel, HenryHjörvarsson, BjörgvinKapaklis, Vassilios

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