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

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

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 m...

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Published in:New journal of physics Vol. 18; no. 2; pp. 23008 - 23015
Main Authors: Arnalds, Unnar B, Chico, Jonathan, Stopfel, Henry, Kapaklis, Vassilios, Bärenbold, Oliver, Verschuuren, Marc A, Wolff, Ulrike, Neu, Volker, Bergman, Anders, Hjörvarsson, Björgvin
Format: Journal Article
Language:English
Published: Bristol IOP Publishing 29-01-2016
Subjects:
Arrays
artificial spins
Ising model
Islands
Magnetic materials
magnetic ordering
Physics
Thickness
Two dimensional analysis
Two dimensional models
Variation
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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.
AbstractList 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.
Author Kapaklis, Vassilios
Verschuuren, Marc A
Hjörvarsson, Björgvin
Chico, Jonathan
Bergman, Anders
Stopfel, Henry
Arnalds, Unnar B
Wolff, Ulrike
Neu, Volker
Bärenbold, Oliver
Author_xml – sequence: 1
  givenname: Unnar B
  surname: Arnalds
  fullname: Arnalds, Unnar B
  email: uarnalds@hi.is
  organization: University of Iceland Science Institute, Dunhaga 3, IS-107 Reykjavik, Iceland
– sequence: 2
  givenname: Jonathan
  surname: Chico
  fullname: Chico, Jonathan
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
– sequence: 3
  givenname: Henry
  surname: Stopfel
  fullname: Stopfel, Henry
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
– sequence: 4
  givenname: Vassilios
  surname: Kapaklis
  fullname: Kapaklis, Vassilios
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
– sequence: 5
  givenname: Oliver
  surname: Bärenbold
  fullname: Bärenbold, Oliver
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
– sequence: 6
  givenname: Marc A
  surname: Verschuuren
  fullname: Verschuuren, Marc A
  organization: Philips Research Laboratories , Eindhoven, The Netherlands
– sequence: 7
  givenname: Ulrike
  surname: Wolff
  fullname: Wolff, Ulrike
  organization: Institute of Metallic Materials IFW Dresden, D-01171 Dresden, Germany
– sequence: 8
  givenname: Volker
  surname: Neu
  fullname: Neu, Volker
  organization: Institute of Metallic Materials IFW Dresden, D-01171 Dresden, Germany
– sequence: 9
  givenname: Anders
  surname: Bergman
  fullname: Bergman, Anders
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
– sequence: 10
  givenname: Björgvin
  surname: Hjörvarsson
  fullname: Hjörvarsson, Björgvin
  organization: Uppsala University Department of Physics and Astronomy, SE-75120 Uppsala, Sweden
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SubjectTerms Arrays
artificial spins
Ising model
Islands
Magnetic materials
magnetic ordering
Physics
Thickness
Two dimensional analysis
Two dimensional models
Variation
Title A new look on the two-dimensional Ising model: thermal artificial spins
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