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

Abstract

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.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5];  [6];  [2]
+ Show Author Affiliations
  1. Laboratory for Neutron Scattering and Imaging Paul Scherrer Institut 5232 Villigen PSI Switzerland
  2. Department of Physics and Astronomy University of Missouri Columbia MO 65211 USA
  3. National Institute of Standards and Technology Gaithersburg MD 20899 USA
  4. Jülich Centre for Neutron Science (JCNS) at Heinz Maier‐Leibnitz Zentrum (MLZ) Forschungszentrum Jülich GmbH Lichtenbergstr. 1 85748 Garching Germany
  5. Forschungszentrum Jülich GmbH Helmholtz Institute Erlangen‐Nürnberg for Renewable Energy (IEK‐11) 90429 Nürnberg Germany
  6. Institut für Theoretische Physik Johannes Kepler Universität A 4040 Linz Austria, Max‐Planck‐Institut für Mikrostrukturphysik Weinberg 2 06120 Halle Germany
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1415662
Alternate Identifier(s):
OSTI ID: 1415663; OSTI ID: 1499003
Grant/Contract Number:  
DE‐SC0014461; SC0014461
Resource Type:
Published Article
Journal Name:
Advanced Science
Additional Journal Information:
Journal Name: Advanced Science Journal Volume: 5 Journal Issue: 4; Journal ID: ISSN 2198-3844
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; artificial magnetic honeycomb lattices; geometrical frustration; neutron reflectometry measurements

Citation Formats

Glavic, Artur, Summers, Brock, Dahal, Ashutosh, Kline, Joseph, Van Herck, Walter, Sukhov, Alexander, Ernst, Arthur, and Singh, Deepak K. Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements. Germany: N. p., 2018. Web. doi:10.1002/advs.201700856.
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Glavic, Artur, Summers, Brock, Dahal, Ashutosh, Kline, Joseph, Van Herck, Walter, Sukhov, Alexander, Ernst, Arthur, & Singh, Deepak K. Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements. Germany. https://doi.org/10.1002/advs.201700856
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Glavic, Artur, Summers, Brock, Dahal, Ashutosh, Kline, Joseph, Van Herck, Walter, Sukhov, Alexander, Ernst, Arthur, and Singh, Deepak K. Thu . "Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements". Germany. https://doi.org/10.1002/advs.201700856.
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@article{osti_1415662,
title = {Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements},
author = {Glavic, Artur and Summers, Brock and Dahal, Ashutosh and Kline, Joseph and Van Herck, Walter and Sukhov, Alexander and Ernst, Arthur and Singh, Deepak K.},
abstractNote = {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.},
doi = {10.1002/advs.201700856},
journal = {Advanced Science},
number = 4,
volume = 5,
place = {Germany},
year = {Thu Jan 04 00:00:00 EST 2018},
month = {Thu Jan 04 00:00:00 EST 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1002/advs.201700856
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Cited by: 16 works
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Figures / Tables:

Figure 1 Figure 1: Structural characterization of artificial honeycomb lattice. a) Full size atomic force microscopy image of typical artificial honeycomb lattice, derived from diblock porous template combined with reactive ion etching (see the text for detail). The bond length, width, and lattice separation are ≈12, 5, and 31 nm, respectively. b)more » Grazing incident X-ray scattering recorded with an incidence angle of 0.15° using Ga Kα. 2D plots, as shown below, are horizontal and vertical integrations of the areas marked as red and green boxes in the image. Numerical simulations, using the same structural parameters as for the neutron models (discussed below), are shown in the same graph for comparison and describe the main features and their positions accurately.« less
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