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Title: Thermally induced magnetic relaxation in square artificial spin ice

Abstract

The properties of natural and artificial assemblies of interacting elements, ranging from Quarks to Galaxies, are at the heart of Physics. The collective response and dynamics of such assemblies are dictated by the intrinsic dynamical properties of the building blocks, the nature of their interactions and topological constraints. Here in this paper, we report on the relaxation dynamics of the magnetization of artificial assemblies of mesoscopic spins. In our model nano-magnetic system $$-$$ square artificial spin ice $$-$$ we are able to control the geometrical arrangement and interaction strength between the magnetically interacting building blocks by means of nano-lithography. Using time resolved magnetometry we show that the relaxation process can be described using the Kohlrausch law and that the extracted temperature dependent relaxation times of the assemblies follow the Vogel-Fulcher law. The results provide insight into the relaxation dynamics of mesoscopic nano-magnetic model systems, with adjustable energy and time scales, and demonstrates that these can serve as an ideal playground for the studies of collective dynamics and relaxations.

Authors:
 [1];  [2];  [2];  [2];  [3];  [1];  [1];  [2];  [2]
+ Show Author Affiliations
  1. Uppsala Univ. (Sweden). Dept. of Engineering Sciences
  2. Uppsala Univ. (Sweden). Dept. of Physics and Astronomy
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1349578
Report Number(s):
BNL-113722-2017-JA
Journal ID: ISSN 2045-2322; KC0403020
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 77 NANOSCIENCE AND NANOTECHNOLOGY; Center for Functional Nanomaterials

Citation Formats

Andersson, M. S., Pappas, S. D., Stopfel, H., Östman, E., Stein, A., Nordblad, P., Mathieu, R., Hjörvarsson, B., and Kapaklis, V. Thermally induced magnetic relaxation in square artificial spin ice. United States: N. p., 2016. Web. doi:10.1038/srep37097.
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Andersson, M. S., Pappas, S. D., Stopfel, H., Östman, E., Stein, A., Nordblad, P., Mathieu, R., Hjörvarsson, B., & Kapaklis, V. Thermally induced magnetic relaxation in square artificial spin ice. United States. https://doi.org/10.1038/srep37097
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Andersson, M. S., Pappas, S. D., Stopfel, H., Östman, E., Stein, A., Nordblad, P., Mathieu, R., Hjörvarsson, B., and Kapaklis, V. Thu . "Thermally induced magnetic relaxation in square artificial spin ice". United States. https://doi.org/10.1038/srep37097. https://www.osti.gov/servlets/purl/1349578.
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@article{osti_1349578,
title = {Thermally induced magnetic relaxation in square artificial spin ice},
author = {Andersson, M. S. and Pappas, S. D. and Stopfel, H. and Östman, E. and Stein, A. and Nordblad, P. and Mathieu, R. and Hjörvarsson, B. and Kapaklis, V.},
abstractNote = {The properties of natural and artificial assemblies of interacting elements, ranging from Quarks to Galaxies, are at the heart of Physics. The collective response and dynamics of such assemblies are dictated by the intrinsic dynamical properties of the building blocks, the nature of their interactions and topological constraints. Here in this paper, we report on the relaxation dynamics of the magnetization of artificial assemblies of mesoscopic spins. In our model nano-magnetic system $-$ square artificial spin ice $-$ we are able to control the geometrical arrangement and interaction strength between the magnetically interacting building blocks by means of nano-lithography. Using time resolved magnetometry we show that the relaxation process can be described using the Kohlrausch law and that the extracted temperature dependent relaxation times of the assemblies follow the Vogel-Fulcher law. The results provide insight into the relaxation dynamics of mesoscopic nano-magnetic model systems, with adjustable energy and time scales, and demonstrates that these can serve as an ideal playground for the studies of collective dynamics and relaxations.},
doi = {10.1038/srep37097},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Thu Nov 24 00:00:00 EST 2016},
month = {Thu Nov 24 00:00:00 EST 2016}
}
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https://doi.org/10.1038/srep37097
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    Works referencing / citing this record:

    Magnetization dynamics of weakly interacting sub-100 nm square artificial spin ices
    journal, December 2019

    Advances in artificial spin ice
    journal, November 2019

    • Skjærvø, Sandra H.; Marrows, Christopher H.; Stamps, Robert L.
    • Nature Reviews Physics, Vol. 2, Issue 1
    • DOI: 10.1038/s42254-019-0118-3

    Collective magnetization dynamics in nanoarrays of thin FePd disks
    journal, May 2019

    Cooperative magnetic phenomena in artificial spin systems: spin liquids, Coulomb phase and fragmentation of magnetism – a colloquium
    journal, March 2019

    Collective magnetization dynamics in nano-arrays of thin FePd discs
    text, January 2019

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