A new look on the two-dimensional Ising model: thermal artificial spins
2016 (English)In: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 18, 023008Article in journal (Refereed) PublishedText
We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two-dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabrication and below a critical thickness of the magnetic material the islands are thermally fluctuating and thus the system is able to explore its phase space. Above the critical thickness the islands freeze-in resulting in an arrested thermalized state for the array. Determining the magnetic state we demonstrate a genuine artificial two-dimensional Ising system which can be analyzed in the context of nearest neighbor interactions.
Place, publisher, year, edition, pages
2016. Vol. 18, 023008
magnetic ordering, artificial spins, Ising model
IdentifiersURN: urn:nbn:se:uu:diva-288634DOI: 10.1088/1367-2630/18/2/023008ISI: 000372453700002OAI: oai:DiVA.org:uu-288634DiVA: diva2:926221
FunderKnut and Alice Wallenberg FoundationSwedish Research CouncilThe Swedish Foundation for International Cooperation in Research and Higher Education (STINT)