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

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Univ Calif Santa Cruz, University of California System, University of California Santa Cruz, Phys Dept
  • LBNL, Lawrence Berkeley National Laboratory, United States Department of Energy (DOE), Brookhaven National Laboratory, Adv Light Source
  • Univ Hamburg, University of Hamburg, Inst Nanostruktur & Festkorperphys
  • LBNL, United States Department of Energy (DOE), Lawrence Berkeley National Laboratory, Brookhaven National Laboratory, Mol Foundry
  • Paul Scherrer Inst, Paul Scherrer Institute, Lab Multiscale Mat Expt LMX
  • University of California
  • Harbin Inst Technol, Harbin Institute of Technology, Sch Mat Sci & Engn

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.

Details

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

    Research areas

  • CRITICAL EXPONENTS, ICE, ENERGY

ID: 34925739