Magnetic stray-field studies of a single Cobalt nanoelement as a component of the building blocks of artificial square spin ice

Merlin Pohlit, Fabrizio Porrati, Michael Huth, Yuzo Ohno, Hideo Ohno, Jens Müller

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We use Focused Electron Beam Deposition (FEBID) to directly write Cobalt magnetic nanoelements onto a micro-Hall magnetometer, which allows for high-sensitivity measurements of the magnetic stray field emanating from the samples. In a previous study [M. Pohlit et al., J. Appl. Phys. 117 (2015) 17C746] [21] we investigated thermal dynamics of an individual building block (nanocluster) of artificial square spin ice. In this work, we compare the results of this structure with interacting elements to the switching of a single nanoisland. By analyzing the survival function of the repeatedly prepared state in a given temperature range, we find thermally activated switching dynamics. A detailed analysis of the hysteresis loop reveals a metastable microstate preceding the overall magnetization reversal of the single nanoelement, also found in micromagnetic simulations. Such internal degrees of freedom may need to be considered, when analyzing the thermal dynamics of larger spin ice configurations on different lattice types.

Original languageEnglish
Pages (from-to)206-212
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume400
DOIs
Publication statusPublished - 2016 Feb 15

Keywords

  • Artificial spin ice
  • Focused Electron Beam Induced Deposition (FEBID)
  • Magnetic frustration
  • Micro-Hall magnetometry
  • Micromagnetic simulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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