%0 Journal Article
%A Pip, Petai
%A Glavic, Artur
%A Skjærvø, Sandra Helen
%A Weber, Anja
%A Smerald, Andrew
%A Zhernenkov, Kirill
%A Leo, Naëmi
%A Mila, Frédéric
%A Philippe, Laetitia
%A Heyderman, Laura J.
%T Direct observation of spin correlations in an artificial triangular lattice Ising spin system with grazing-incidence small-angle neutron scattering
%J Nanoscale horizons
%V 6
%N 6
%@ 2055-6756
%C Cambridge
%I Royal Society of Chemistry
%M FZJ-2021-04946
%P 474 - 481
%D 2021
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:33960354
%U <Go to ISI:>//WOS:000648033800001
%R 10.1039/D1NH00043H
%U https://juser.fz-juelich.de/record/903239