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Thermal string excitations in artificial spin-ice square dipolar arrays
Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany; Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany.ORCID iD: 0000-0001-8007-5392
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany.
Max-Planck-Institut für Mikrostrukturphysik, Halle (Saale), Germany; Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany.
Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Halle (Saale), Germany.
2014 (English)In: Journal of Physics: Condensed Matter, ISSN 0953-8984, E-ISSN 1361-648X, Vol. 26, no 26, article id 266006Article in journal (Refereed) Published
Abstract [en]

We report on a theoretical investigation of artificial spin-ice dipolar arrays using a nanoisland shape adopted from recent experiments (Farhan et al 2013 Nature Phys. 9 375). The number of thermal magnetic string excitations in the square lattice is drastically increased by a vertical displacement of rows and columns. We find large increments especially for low temperatures and for string excitations with quasi-monopoles of charges ±4. By kinetic Monte Carlo simulations we address the thermal stability of such excitations, thereby providing time scales for their experimental observation.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2014. Vol. 26, no 26, article id 266006
Keywords [en]
Classical spin model, magnetic monopoles, micromagnetic simulations, spin-ice dipolar arrays, Condensed matter physics, Physics, Classical spin models, Kinetic monte carlo simulation, Low temperatures, Theoretical investigations, Vertical displacements, Ice
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-83937DOI: 10.1088/0953-8984/26/26/266006ISI: 000337349200021Scopus ID: 2-s2.0-84902270353OAI: oai:DiVA.org:oru-83937DiVA, id: diva2:1449076
Available from: 2020-06-29 Created: 2020-06-29 Last updated: 2020-06-29Bibliographically approved

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Thonig, Danny

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