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Pip, Petai [Author]; Glavic, Artur [Author]; Skjærvø, Sandra Helen [Author]; Weber, Anja [Author]; Smerald, Andrew [Author]; Zhernenkov, Kirill [Author]; Leo, Naëmi [Author]; Mila, Frédéric [Author]; Philippe, Laetitia [Author]; Heyderman, Laura J. [Author]

Direct observation of spin correlations in an artificial triangular lattice Ising spin system with grazing-incidence small-angle neutron scattering

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  • Media type: E-Article
  • Title: Direct observation of spin correlations in an artificial triangular lattice Ising spin system with grazing-incidence small-angle neutron scattering
  • Contributor: Pip, Petai [Author]; Glavic, Artur [Author]; Skjærvø, Sandra Helen [Author]; Weber, Anja [Author]; Smerald, Andrew [Author]; Zhernenkov, Kirill [Author]; Leo, Naëmi [Author]; Mila, Frédéric [Author]; Philippe, Laetitia [Author]; Heyderman, Laura J. [Author]
  • imprint: Royal Society of Chemistry, 2021
  • Published in: Nanoscale horizons 6(6), 474 - 481 (2021). doi:10.1039/D1NH00043H
  • Language: English
  • DOI: https://doi.org/10.1039/D1NH00043H
  • ISSN: 2055-6764; 2055-6756
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: The triangular lattice with Ising magnetic moments is an archetypical example of geometric frustration. In the case of dipolar-coupled out-of-plane moments, the geometric frustration results in a disordered classical spin-liquid state at higher temperatures while the system is predicted to transition to an anti-ferromagnetic stripe ground state at low temperatures. In this work we fabricate artificial triangular Ising spin systems without and with uniaxial in-plane compression to tune the nature and temperature of the correlations. We probe the energy scale and nature of magnetic correlations by grazing-incidence small-angle neutron scattering. In particular, we apply a newly-developed empirical structure-factor model to describe the measured short-range correlated spin-liquid state, and find good agreement with theoretical predictions. We demonstrate that grazing-incidence neutron scattering on our high-quality samples, in conjunction with detailed modeling of the scattering using the Distorted Wave Born Approximation, can be used to experimentally quantify the spin-liquid-like correlations in highly-frustrated artificial spin systems.
  • Access State: Open Access