Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets

Michael Saccone*, Andreas Scholl, Sven Velten, Scott Dhuey, Kevin Hofhuis, Clemens Wuth, Yen-Lin Huang, Zuhuang Chen, Rajesh Chopdekar, Alan Farhan

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We explore the thermodynamics in two-dimensional arrays consisting of Ising-type nanomagnets lithographically arranged onto random sites and angular orientations. Introducing these basic spin-glass ingredients, we study the characteristic features of the low-energy states achieved, following thermal-annealing protocols. From direct visualization of real-time dynamics, we record relaxation timescales together with magnetic susceptibility variations over temperature, revealing trends towards short-range order as randomness is increased, but falling short of pure spin-glass behavior. Our work provides a route towards the realization of artificial Ising spin-glass systems.

Original languageEnglish
Article number224403
Number of pages7
JournalPhysical Review B
Volume99
Issue number22
DOIs
Publication statusPublished - 3 Jun 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • CRITICAL EXPONENTS
  • ICE
  • ENERGY

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