Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements

Glavic, Artur; Summers, Brock; Dahal, Ashutosh; Kline, Joseph; Van Herck, Walter; Sukhov, Alexander; Ernst, Arthur; Singh, Deepak K.

doi:10.1002/advs.201700856

Title: Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements

Journal Article · Thu Jan 04 00:00:00 EST 2018 · Advanced Science

DOI:https://doi.org/10.1002/advs.201700856· OSTI ID:1415662

Glavic, Artur ^[1]; Summers, Brock ^[2]; Dahal, Ashutosh ^[2]; Kline, Joseph ^[3]; Van Herck, Walter ^[4]; Sukhov, Alexander ^[5]; Ernst, Arthur ^[6]; Singh, Deepak K. ^[2]

Laboratory for Neutron Scattering and Imaging Paul Scherrer Institut 5232 Villigen PSI Switzerland
Department of Physics and Astronomy University of Missouri Columbia MO 65211 USA
National Institute of Standards and Technology Gaithersburg MD 20899 USA
Jülich Centre for Neutron Science (JCNS) at Heinz Maier‐Leibnitz Zentrum (MLZ) Forschungszentrum Jülich GmbH Lichtenbergstr. 1 85748 Garching Germany
Forschungszentrum Jülich GmbH Helmholtz Institute Erlangen‐Nürnberg for Renewable Energy (IEK‐11) 90429 Nürnberg Germany
Institut für Theoretische Physik Johannes Kepler Universität A 4040 Linz Austria, Max‐Planck‐Institut für Mikrostrukturphysik Weinberg 2 06120 Halle Germany

Abstract The nature of magnetic correlation at low temperature in two‐dimensional artificial magnetic honeycomb lattice is a strongly debated issue. While theoretical researches suggest that the system will develop a novel zero entropy spin solid state as T → 0 K, a confirmation to this effect in artificial honeycomb lattice of connected elements is lacking. This study reports on the investigation of magnetic correlation in newly designed artificial permalloy honeycomb lattice of ultrasmall elements, with a typical length of ≈12 nm, using neutron scattering measurements and temperature‐dependent micromagnetic simulations. Numerical modeling of the polarized neutron reflectometry data elucidates the temperature‐dependent evolution of spin correlation in this system. As temperature reduces to ≈7 K, the system tends to develop novel spin solid state, manifested by the alternating distribution of magnetic vortex loops of opposite chiralities. Experimental results are complemented by temperature‐dependent micromagnetic simulations that confirm the dominance of spin solid state over local magnetic charge ordered state in the artificial honeycomb lattice with connected elements. These results enable a direct investigation of novel spin solid correlation in the connected honeycomb geometry of 2D artificial structure.

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Research Organization:: Univ. of Missouri, Columbia, MO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: DE‐SC0014461; SC0014461

OSTI ID:: 1415662

Alternate ID(s):: OSTI ID: 1415663; OSTI ID: 1499003

Journal Information:: Advanced Science, Journal Name: Advanced Science Vol. 5 Journal Issue: 4; ISSN 2198-3844

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 16 works

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