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Title: Temperature-dependent magnetism in artificial honeycomb lattice of connected elements

Abstract

Artificial magnetic honeycomb lattices are expected to exhibit a broad and tunable range of novel magnetic phenomena that would be difficult to achieve in natural materials, such as long-range spin ice, entropy-driven magnetic charge-ordered states, and spin order due to the spin chirality. Eventually, the spin correlation is expected to develop into a unique spin-solid-state-density ground state, manifested by the distribution of the pairs of vortex states of opposite chirality. In this paper we report the creation of an artificial permalloy honeycomb lattice of ultrasmall connecting bonds, with a typical size of $${\simeq}12$$ nm. Detailed magnetic and neutron-scattering measurements on the newly fabricated honeycomb lattice demonstrate the evolution of magnetic correlation as a function of temperature. Finally, at low enough temperature, neutron-scattering measurements and micromagnetic simulation suggest the development of a loop state of vortex configuration in this system.

Authors:
 [1];  [2];  [1];  [3];  [1];  [1];  [1]
  1. Univ. of Missouri, Columbia, MO (United States). Dept. of Physics and Astronomy
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Paul Scherrer Inst. (PSI), Villigen (Switzerland). Lab. for Neutron Scattering and Imaging
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Missouri, Columbia, MO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1463978
Alternate Identifier(s):
OSTI ID: 1415529
Grant/Contract Number:  
AC05-00OR22725; SC0014461; DGE-1069091
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; frustrated magnetism; magnetic phase transitions; magnetotransport; spintronics

Citation Formats

Summers, B., Debeer-Schmitt, L., Dahal, A., Glavic, A., Kampschroeder, P., Gunasekera, J., and Singh, D. K. Temperature-dependent magnetism in artificial honeycomb lattice of connected elements. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.014401.
Summers, B., Debeer-Schmitt, L., Dahal, A., Glavic, A., Kampschroeder, P., Gunasekera, J., & Singh, D. K. Temperature-dependent magnetism in artificial honeycomb lattice of connected elements. United States. doi:10.1103/PhysRevB.97.014401.
Summers, B., Debeer-Schmitt, L., Dahal, A., Glavic, A., Kampschroeder, P., Gunasekera, J., and Singh, D. K. Wed . "Temperature-dependent magnetism in artificial honeycomb lattice of connected elements". United States. doi:10.1103/PhysRevB.97.014401. https://www.osti.gov/servlets/purl/1463978.
@article{osti_1463978,
title = {Temperature-dependent magnetism in artificial honeycomb lattice of connected elements},
author = {Summers, B. and Debeer-Schmitt, L. and Dahal, A. and Glavic, A. and Kampschroeder, P. and Gunasekera, J. and Singh, D. K.},
abstractNote = {Artificial magnetic honeycomb lattices are expected to exhibit a broad and tunable range of novel magnetic phenomena that would be difficult to achieve in natural materials, such as long-range spin ice, entropy-driven magnetic charge-ordered states, and spin order due to the spin chirality. Eventually, the spin correlation is expected to develop into a unique spin-solid-state-density ground state, manifested by the distribution of the pairs of vortex states of opposite chirality. In this paper we report the creation of an artificial permalloy honeycomb lattice of ultrasmall connecting bonds, with a typical size of ${\simeq}12$ nm. Detailed magnetic and neutron-scattering measurements on the newly fabricated honeycomb lattice demonstrate the evolution of magnetic correlation as a function of temperature. Finally, at low enough temperature, neutron-scattering measurements and micromagnetic simulation suggest the development of a loop state of vortex configuration in this system.},
doi = {10.1103/PhysRevB.97.014401},
journal = {Physical Review B},
issn = {2469-9950},
number = 1,
volume = 97,
place = {United States},
year = {2018},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 2 works
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Figures / Tables:

FIG. 1: FIG. 1:: Schematic description of spin configuration on a two dimensional honeycomb lattice vertex and the atomic force micrograph. (a-c) Typical 2-out 1-in and all-out spin arrangements on a vertex of a 2-dimensional artificial magnetic honeycomb lattice resulting into net magnetic charges of ±Q and ±3Q, respectively. (d) Theoretical researchesmore » suggest that at sufficiently low temperature, magnetic charges at the vertexes of an artificial honeycomb lattice can arrange themselves to create a spin solid state, manifested by the periodic arrangement of pairs of chiral vortex states. (e) A full size atomic force micrograph of artificial honeycomb lattice, derived from diblock porous template combined with reactive ion etching. The bond length, width and lattice separation are approximately 12 nm, 5 nm and 26 nm, respectively. (f) Atomic force micrograph of a typical metallic honeycomb lattice fabricated using the method described in the text and the Supplementary Materials.« less

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