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Title: Emergent geometric frustration of artificial magnetic skyrmion crystals

Abstract

Magnetic skyrmions have been receiving growing attention as potential information storage and magnetic logic devices since an increasing number of materials have been identified that support skyrmion phases. Explorations of artificial frustrated systems have led to new insights into controlling and engineering new emergent frustration phenomena in frustrated and disordered systems. Here, we propose a skyrmion spin ice, giving a unifying framework for the study of geometric frustration of skyrmion crystals (SCs) in a nonfrustrated artificial geometrical lattice as a consequence of the structural confinement of skyrmions in magnetic potential wells. The emergent ice rules from the geometrically frustrated SCs highlight a novel phenomenon in this skyrmion system: emergent geometrical frustration. We demonstrate how SC topology transitions between a nonfrustrated periodic configuration and a frustrated icelike ordering can also be realized reversibly. The proposed artificial frustrated skyrmion systems can be annealed into different ice phases with an applied current-induced spin-transfer torque, including a long-range ordered ice rule obeying ground state, as-relaxed random state, biased state, and monopole state. In conclusion, the spin-torque reconfigurability of the artificial skyrmion ice states, difficult to achieve in other artificial spin ice systems, is compatible with standard spintronic device fabrication technology, which makes the semiconductormore » industrial integration straightforward.« less

Authors:
 [1];  [2];  [1];  [2];  [1]
  1. Nanyang Technological Univ. (Singapore)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1337093
Report Number(s):
LA-UR-15-29308
Journal ID: ISSN 2469-9950
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 14; 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; 36 MATERIALS SCIENCE

Citation Formats

Ma, Fusheng, Reichhardt, Charles, Gan, Weiliang, Reichhardt, Cynthia Jane Olson, and Lew, Wen Siang. Emergent geometric frustration of artificial magnetic skyrmion crystals. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.144405.
Ma, Fusheng, Reichhardt, Charles, Gan, Weiliang, Reichhardt, Cynthia Jane Olson, & Lew, Wen Siang. Emergent geometric frustration of artificial magnetic skyrmion crystals. United States. doi:10.1103/PhysRevB.94.144405.
Ma, Fusheng, Reichhardt, Charles, Gan, Weiliang, Reichhardt, Cynthia Jane Olson, and Lew, Wen Siang. Wed . "Emergent geometric frustration of artificial magnetic skyrmion crystals". United States. doi:10.1103/PhysRevB.94.144405. https://www.osti.gov/servlets/purl/1337093.
@article{osti_1337093,
title = {Emergent geometric frustration of artificial magnetic skyrmion crystals},
author = {Ma, Fusheng and Reichhardt, Charles and Gan, Weiliang and Reichhardt, Cynthia Jane Olson and Lew, Wen Siang},
abstractNote = {Magnetic skyrmions have been receiving growing attention as potential information storage and magnetic logic devices since an increasing number of materials have been identified that support skyrmion phases. Explorations of artificial frustrated systems have led to new insights into controlling and engineering new emergent frustration phenomena in frustrated and disordered systems. Here, we propose a skyrmion spin ice, giving a unifying framework for the study of geometric frustration of skyrmion crystals (SCs) in a nonfrustrated artificial geometrical lattice as a consequence of the structural confinement of skyrmions in magnetic potential wells. The emergent ice rules from the geometrically frustrated SCs highlight a novel phenomenon in this skyrmion system: emergent geometrical frustration. We demonstrate how SC topology transitions between a nonfrustrated periodic configuration and a frustrated icelike ordering can also be realized reversibly. The proposed artificial frustrated skyrmion systems can be annealed into different ice phases with an applied current-induced spin-transfer torque, including a long-range ordered ice rule obeying ground state, as-relaxed random state, biased state, and monopole state. In conclusion, the spin-torque reconfigurability of the artificial skyrmion ice states, difficult to achieve in other artificial spin ice systems, is compatible with standard spintronic device fabrication technology, which makes the semiconductor industrial integration straightforward.},
doi = {10.1103/PhysRevB.94.144405},
journal = {Physical Review B},
number = 14,
volume = 94,
place = {United States},
year = {Wed Oct 05 00:00:00 EDT 2016},
month = {Wed Oct 05 00:00:00 EDT 2016}
}

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Cited by: 5 works
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Works referenced in this record:

Freezing and thawing of artificial ice by thermal switching of geometric frustration in magnetic flux lattices
journal, August 2014

  • Trastoy, J.; Malnou, M.; Ulysse, C.
  • Nature Nanotechnology, Vol. 9, Issue 9, p. 710-715
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Spontaneous skyrmion ground states in magnetic metals
journal, August 2006

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