Direct observation of spin correlations in an artificial triangular lattice Ising spin system with grazing-incidence small-angle neutron scattering†
| Autor: | Laura J. Heyderman, Kirill Zhernenkov, Artur Glavic, A Weber, Naëmi Leo, Petai Pip, Sandra H. Skjærvø, Frédéric Mila, Andrew Smerald, Laetitia Philippe |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Condensed matter physics Scattering media_common.quotation_subject ice Frustration 02 engineering and technology Neutron scattering 021001 nanoscience & nanotechnology 01 natural sciences Small-angle neutron scattering Chemistry 0103 physical sciences ddc:540 General Materials Science Hexagonal lattice Ising model Condensed Matter::Strongly Correlated Electrons phase Born approximation 010306 general physics 0210 nano-technology Ground state media_common |
| Zdroj: | Nanoscale Horizons Nanoscale horizons 6(6), 474-481 (2021). doi:10.1039/D1NH00043H Nanoscale Horizons, 6 (6) |
| ISSN: | 2055-6764 2055-6756 |
| Popis: | 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. Nanoscale Horizons, 6 (6) ISSN:2055-6756 ISSN:2055-6764 |
| Databáze: | OpenAIRE |
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