Configurable Artificial Spin Ice with Site-Specific Local Magnetic Fields
We demonstrate ground state tunability for a hybrid artificial spin ice composed of Fe nanomagnets which are subject to site-specific exchange-bias fields, applied in integer multiples of the lattice along one sublattice of the classic square artificial spin ice. By varying this period, three distinct magnetic textures are identified: a striped ferromagnetic phase; an antiferromagnetic phase attainable through an external field protocol alone; and an unconventional ground state with magnetically charged pairs embedded in an antiferromagnetic matrix. Monte Carlo simulations support the results of field protocols and demonstrate that the pinning tunes relaxation timescales and their critical behavior.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2021 |
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Erschienen: |
2021 |
Enthalten in: |
Zur Gesamtaufnahme - volume:126 |
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Enthalten in: |
Physical review letters - 126(2021), 1 vom: 08. Jan., Seite 017203 |
Sprache: |
Englisch |
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Beteiligte Personen: |
Parakkat, Vineeth Mohanan [VerfasserIn] |
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Date Revised 25.01.2021 published: Print Citation Status PubMed-not-MEDLINE |
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doi: |
10.1103/PhysRevLett.126.017203 |
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PPN (Katalog-ID): |
NLM320430014 |
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520 | |a We demonstrate ground state tunability for a hybrid artificial spin ice composed of Fe nanomagnets which are subject to site-specific exchange-bias fields, applied in integer multiples of the lattice along one sublattice of the classic square artificial spin ice. By varying this period, three distinct magnetic textures are identified: a striped ferromagnetic phase; an antiferromagnetic phase attainable through an external field protocol alone; and an unconventional ground state with magnetically charged pairs embedded in an antiferromagnetic matrix. Monte Carlo simulations support the results of field protocols and demonstrate that the pinning tunes relaxation timescales and their critical behavior | ||
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