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

doi:10.1103/PhysRevB.99.224403

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 journal › Article › Scientific › peer-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 language	English
Article number	224403
Number of pages	7
Journal	Physical Review B
Volume	99
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.99.224403
Publication status	Published - 3 Jun 2019
MoE publication type	A1 Journal article-refereed

Keywords

CRITICAL EXPONENTS
ICE
ENERGY

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10.1103/PhysRevB.99.224403

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Cite this

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title = "Towards artificial Ising spin glasses: Thermal ordering in randomized arrays of Ising-type nanomagnets",

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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year = "2019",

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language = "English",

volume = "99",

journal = "Physical Review B (Condensed Matter and Materials Physics)",

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Towards artificial Ising spin glasses : Thermal ordering in randomized arrays of Ising-type nanomagnets. / Saccone, Michael; Scholl, Andreas; Velten, Sven; Dhuey, Scott; Hofhuis, Kevin; Wuth, Clemens; Huang, Yen-Lin; Chen, Zuhuang; Chopdekar, Rajesh; Farhan, Alan.

In: Physical Review B, Vol. 99, No. 22, 224403, 03.06.2019.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Towards artificial Ising spin glasses

T2 - Thermal ordering in randomized arrays of Ising-type nanomagnets

AU - Saccone, Michael

AU - Scholl, Andreas

AU - Velten, Sven

AU - Dhuey, Scott

AU - Hofhuis, Kevin

AU - Wuth, Clemens

AU - Huang, Yen-Lin

AU - Chen, Zuhuang

AU - Chopdekar, Rajesh

AU - Farhan, Alan

PY - 2019/6/3

Y1 - 2019/6/3

N2 - 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.

AB - 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.

KW - CRITICAL EXPONENTS

KW - ICE

KW - ENERGY

U2 - 10.1103/PhysRevB.99.224403

DO - 10.1103/PhysRevB.99.224403

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JO - Physical Review B (Condensed Matter and Materials Physics)

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