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  • Slöetjes, Sam D.Uppsala universitet,Materialfysik,Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway; LBNL, Adv Light Source, Berkeley, CA 94720 USA (author)

Effects of array shape and disk ellipticity in dipolar-coupled magnetic metamaterials

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • American Physical Society,2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-467398
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-467398URI
  • https://doi.org/10.1103/PhysRevB.104.134421DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Two-dimensional lattices of dipolar-coupled thin film ferromagnetic nanodisks give rise to emergent superferromagnetic (SFM) order when the spacing between dots becomes sufficiently small. In this paper, we define micron-sized arrays of permalloy nanodisks arranged on a hexagonal lattice. The arrays were shaped as hexagons, squares, and rectangles to investigate finite-size effects in the SFM domain structure for such arrays. The resulting domain patterns were examined using x-ray magnetic circular dichroism photoemission electron microscopy. At room temperature, we find these SFM metamaterials to be below their blocking temperature. Distinct differences were found in the magnetic switching characteristics of horizontally and vertically oriented rectangular arrays. The results are corroborated by micromagnetic simulations.

Subject headings and genre

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  • Digernes, Einar S.Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • Strømberg, AndersNorwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • Olsen, Fredrik K.Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • Bang, Ambjørn D.Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • N'Diaye, Alpha T.LBNL, Adv Light Source, Berkeley, CA 94720 USA. (author)
  • Chopdekar, Rajesh V.LBNL, Adv Light Source, Berkeley, CA 94720 USA. (author)
  • Folven, ErikNorwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • Grepstad, Jostein K.Norwegian Univ Sci & Technol NTNU, Dept Elect Syst, NO-7491 Trondheim, Norway. (author)
  • Uppsala universitetMaterialfysik (creator_code:org_t)

Related titles

  • In:Physical Review B: American Physical Society104:132469-99502469-9969

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