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Title: Reconfigurable wave band structure of an artificial square ice

Abstract

Artificial square ices are structures composed of magnetic nanoelements arranged on the sites of a twodimensional square lattice, such that there are four interacting magnetic elements at each vertex, leading to geometrical frustration. Using a semianalytical approach, we show that square ices exhibit a rich spin-wave band structure that is tunable both by external magnetic fields and the magnetization configuration of individual elements. Internal degrees of freedom can give rise to equilibrium states with bent magnetization at the element edges leading to characteristic excitations; in the presence of magnetostatic interactions these form separate bands analogous to impurity bands in semiconductors. Full-scale micromagnetic simulations corroborate our semianalytical approach. Our results show that artificial square ices can be viewed as reconfigurable and tunable magnonic crystals that can be used as metamaterials for spin-wave-based applications at the nanoscale.

Authors:
 [1];  [2];  [3];  [4]
  1. Univ. of Colorado, Boulder, CO (United States); Chalmers Univ. of Technology, Gothenburg (Sweden); Univ. of Gothenburg (Sweden)
  2. ETH Zurich (Switzerland); Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  3. Univ. of Glasgow, Scotland (United Kingdom)
  4. Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern-Argonne Inst. for Science and Engineering, Evanston, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Swedish Research Council (SRC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1339524
Alternate Identifier(s):
OSTI ID: 1247901
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 93; Journal Issue: 13; Journal ID: ISSN 0163-1829
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; atrificial spin ice; magnonics

Citation Formats

lacocca, Ezio, Gliga, Sebastian, Stamps, Robert L., and Heinonen, Olle. Reconfigurable wave band structure of an artificial square ice. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.134420.
lacocca, Ezio, Gliga, Sebastian, Stamps, Robert L., & Heinonen, Olle. Reconfigurable wave band structure of an artificial square ice. United States. doi:10.1103/PhysRevB.93.134420.
lacocca, Ezio, Gliga, Sebastian, Stamps, Robert L., and Heinonen, Olle. Mon . "Reconfigurable wave band structure of an artificial square ice". United States. doi:10.1103/PhysRevB.93.134420. https://www.osti.gov/servlets/purl/1339524.
@article{osti_1339524,
title = {Reconfigurable wave band structure of an artificial square ice},
author = {lacocca, Ezio and Gliga, Sebastian and Stamps, Robert L. and Heinonen, Olle},
abstractNote = {Artificial square ices are structures composed of magnetic nanoelements arranged on the sites of a twodimensional square lattice, such that there are four interacting magnetic elements at each vertex, leading to geometrical frustration. Using a semianalytical approach, we show that square ices exhibit a rich spin-wave band structure that is tunable both by external magnetic fields and the magnetization configuration of individual elements. Internal degrees of freedom can give rise to equilibrium states with bent magnetization at the element edges leading to characteristic excitations; in the presence of magnetostatic interactions these form separate bands analogous to impurity bands in semiconductors. Full-scale micromagnetic simulations corroborate our semianalytical approach. Our results show that artificial square ices can be viewed as reconfigurable and tunable magnonic crystals that can be used as metamaterials for spin-wave-based applications at the nanoscale.},
doi = {10.1103/PhysRevB.93.134420},
journal = {Physical Review, B: Condensed Matter},
number = 13,
volume = 93,
place = {United States},
year = {Mon Apr 18 00:00:00 EDT 2016},
month = {Mon Apr 18 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 11 works
Citation information provided by
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