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

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. Here, 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]
  1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  2. Univ. of Missouri, Columbia, MO (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  4. Forschungszentrum Jülich GmbH, Garching (Germany)
  5. Forschungszentrum Jülich GmbH, Nurnberg (Germany)
  6. Johannes Kepler Univ., Linz (Austria); Max-Planck-Institut fur Mikrostrukturphysik, Halle (Germany)
Publication Date:
Research Org.:
Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1415662
Alternate Identifier(s):
OSTI ID: 1415663; OSTI ID: 1499003
Grant/Contract Number:  
SC0014461
Resource Type:
Journal Article: Published Article
Journal Name:
Advanced Science
Additional Journal Information:
Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 2198-3844
Publisher:
Wiley
Country of Publication:
United States
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. United States: N. p., 2018. Web. doi:10.1002/advs.201700856.
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. United States. doi:10.1002/advs.201700856.
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". United States. doi:10.1002/advs.201700856.
@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 = {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. Here, 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},
issn = {2198-3844},
number = 4,
volume = 5,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/advs.201700856

Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.