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

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2019-06-03

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en

Pages

7

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Physical Review B, Volume 99, issue 22

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.

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CRITICAL EXPONENTS, ICE, ENERGY

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Citation

Saccone, M, Scholl, A, Velten, S, Dhuey, S, Hofhuis, K, Wuth, C, Huang, Y-L, Chen, Z, Chopdekar, R & Farhan, A 2019, ' Towards artificial Ising spin glasses : Thermal ordering in randomized arrays of Ising-type nanomagnets ', Physical Review B, vol. 99, no. 22, 224403 . https://doi.org/10.1103/PhysRevB.99.224403