TY  - JOUR
AU  - Pip, Petai
AU  - Glavic, Artur
AU  - Skjærvø, Sandra Helen
AU  - Weber, Anja
AU  - Smerald, Andrew
AU  - Zhernenkov, Kirill
AU  - Leo, Naëmi
AU  - Mila, Frédéric
AU  - Philippe, Laetitia
AU  - Heyderman, Laura J.
TI  - Direct observation of spin correlations in an artificial triangular lattice Ising spin system with grazing-incidence small-angle neutron scattering
JO  - Nanoscale horizons
VL  - 6
IS  - 6
SN  - 2055-6756
CY  - Cambridge
PB  - Royal Society of Chemistry
M1  - FZJ-2021-04946
SP  - 474 - 481
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:33960354
UR  - <Go to ISI:>//WOS:000648033800001
DO  - DOI:10.1039/D1NH00043H
UR  - https://juser.fz-juelich.de/record/903239
ER  -