A new look on the two-dimensional Ising model: Thermal artificial spins

Unnar B. Arnalds; Jonathan Chico; Henry Stopfel; Vassilios Kapaklis; Oliver Bärenbold; Marc A. Verschuuren; Ulrike Wolff; Volker Neu; Anders Bergman; Björgvin Hjörvarsson

doi:10.1088/1367-2630/18/2/023008

A new look on the two-dimensional Ising model: Thermal artificial spins

Unnar B. Arnalds
, Jonathan Chico
, Henry Stopfel
, Vassilios Kapaklis
, Oliver Bärenbold
, Marc A. Verschuuren
, Ulrike Wolff
, Volker Neu
, Anders Bergman
, Björgvin Hjörvarsson

Faculty of Physical Sciences

University of Iceland

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

Abstract

We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two-dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabrication and below a critical thickness of the magnetic material the islands are thermally fluctuating and thus the system is able to explore its phase space. Above the critical thickness the islands freeze-in resulting in an arrested thermalized state for the array. Determining the magnetic state we demonstrate a genuine artificial two-dimensional Ising system which can be analyzed in the context of nearest neighbor interactions.

Original language	English
Article number	023008
Journal	New Journal of Physics
Volume	18
Issue number	2
DOIs	https://doi.org/10.1088/1367-2630/18/2/023008
Publication status	Published - 29 Jan 2016

Bibliographical note

Funding Information: The authors acknowledge the support of the Knut and Alice Wallenberg Foundation, the Swedish Research Council, and the Swedish Foundation for International Cooperation in Research and Higher Education. UBA acknowledges funding from the Icelandic Research Fund Grant No. 141518-051. AB acknowledges the Swedish Research Council (VR) and eSSENCE. The computer simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputer Centre (NSC) and High Performance Computing Center North (HPC2N). Publisher Copyright: © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Other keywords

Ising model
artificial spins
magnetic ordering

Access to Document

10.1088/1367-2630/18/2/023008

Cite this

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title = "A new look on the two-dimensional Ising model: Thermal artificial spins",

abstract = "We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two-dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabrication and below a critical thickness of the magnetic material the islands are thermally fluctuating and thus the system is able to explore its phase space. Above the critical thickness the islands freeze-in resulting in an arrested thermalized state for the array. Determining the magnetic state we demonstrate a genuine artificial two-dimensional Ising system which can be analyzed in the context of nearest neighbor interactions.",

keywords = "Ising model, artificial spins, magnetic ordering",

author = "Arnalds, \{Unnar B.\} and Jonathan Chico and Henry Stopfel and Vassilios Kapaklis and Oliver B{\"a}renbold and Verschuuren, \{Marc A.\} and Ulrike Wolff and Volker Neu and Anders Bergman and Bj{\"o}rgvin Hj{\"o}rvarsson",

note = "Funding Information: The authors acknowledge the support of the Knut and Alice Wallenberg Foundation, the Swedish Research Council, and the Swedish Foundation for International Cooperation in Research and Higher Education. UBA acknowledges funding from the Icelandic Research Fund Grant No. 141518-051. AB acknowledges the Swedish Research Council (VR) and eSSENCE. The computer simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputer Centre (NSC) and High Performance Computing Center North (HPC2N). Publisher Copyright: {\textcopyright} 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.",

year = "2016",

month = jan,

day = "29",

doi = "10.1088/1367-2630/18/2/023008",

language = "English",

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T2 - Thermal artificial spins

AU - Arnalds, Unnar B.

AU - Chico, Jonathan

AU - Stopfel, Henry

AU - Kapaklis, Vassilios

AU - Bärenbold, Oliver

AU - Verschuuren, Marc A.

AU - Wolff, Ulrike

AU - Neu, Volker

AU - Bergman, Anders

AU - Hjörvarsson, Björgvin

N1 - Funding Information: The authors acknowledge the support of the Knut and Alice Wallenberg Foundation, the Swedish Research Council, and the Swedish Foundation for International Cooperation in Research and Higher Education. UBA acknowledges funding from the Icelandic Research Fund Grant No. 141518-051. AB acknowledges the Swedish Research Council (VR) and eSSENCE. The computer simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputer Centre (NSC) and High Performance Computing Center North (HPC2N). Publisher Copyright: © 2016 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

PY - 2016/1/29

Y1 - 2016/1/29

N2 - We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two-dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabrication and below a critical thickness of the magnetic material the islands are thermally fluctuating and thus the system is able to explore its phase space. Above the critical thickness the islands freeze-in resulting in an arrested thermalized state for the array. Determining the magnetic state we demonstrate a genuine artificial two-dimensional Ising system which can be analyzed in the context of nearest neighbor interactions.

AB - We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two-dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabrication and below a critical thickness of the magnetic material the islands are thermally fluctuating and thus the system is able to explore its phase space. Above the critical thickness the islands freeze-in resulting in an arrested thermalized state for the array. Determining the magnetic state we demonstrate a genuine artificial two-dimensional Ising system which can be analyzed in the context of nearest neighbor interactions.

KW - Ising model

KW - artificial spins

KW - magnetic ordering

UR - https://www.scopus.com/pages/publications/84960191961

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M3 - Article

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VL - 18

JO - New Journal of Physics

JF - New Journal of Physics

IS - 2

M1 - 023008

ER -

A new look on the two-dimensional Ising model: Thermal artificial spins

Abstract

Bibliographical note

Other keywords

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