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Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate
We report the epitaxial formation of metastable γ-(Fe(x)Ni(1−x))Si(2) nanostructure arrays resulting from the reaction of Ni(80)Fe(20) permalloy with vicinal Si(111) surface atoms. We then explore the effect of structure and composition on the nanostructure’s magnetic properties. The low-temperature...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8155884/ https://www.ncbi.nlm.nih.gov/pubmed/34065681 http://dx.doi.org/10.3390/nano11051310 |
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author | Bhukta, Anjan Horvitz, Dror Kohn, Amit Goldfarb, Ilan |
author_facet | Bhukta, Anjan Horvitz, Dror Kohn, Amit Goldfarb, Ilan |
author_sort | Bhukta, Anjan |
collection | PubMed |
description | We report the epitaxial formation of metastable γ-(Fe(x)Ni(1−x))Si(2) nanostructure arrays resulting from the reaction of Ni(80)Fe(20) permalloy with vicinal Si(111) surface atoms. We then explore the effect of structure and composition on the nanostructure’s magnetic properties. The low-temperature annealing (T < 600 °C) of a pre-deposited permalloy film led to solid-phase epitaxial nucleation of compact disk-shaped island nanostructures decorating <110> ledges of the stepped surface, with either (2 [Formula: see text] 2) or ([Formula: see text]) R30° reconstructed flat top faces. High resolution scanning transmission electron microscopy analysis demonstrated fully coherent epitaxy of the islands with respect to the substrate, consistent with a well-matched CaF(2)-prototype structure associated with γ-FeSi(2), along perfect atomically sharp interfaces. Energy dispersive spectroscopy detected ternary composition of the islands, with Fe and Ni atoms confined to the islands, and no trace of segregation. Our magnetometry measurements revealed the superparamagnetic behavior of the silicide islands, with a blocking temperature around 30 K, reflecting the size, shape, and dilute arrangement of the islands in the assembly. |
format | Online Article Text |
id | pubmed-8155884 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81558842021-05-28 Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate Bhukta, Anjan Horvitz, Dror Kohn, Amit Goldfarb, Ilan Nanomaterials (Basel) Article We report the epitaxial formation of metastable γ-(Fe(x)Ni(1−x))Si(2) nanostructure arrays resulting from the reaction of Ni(80)Fe(20) permalloy with vicinal Si(111) surface atoms. We then explore the effect of structure and composition on the nanostructure’s magnetic properties. The low-temperature annealing (T < 600 °C) of a pre-deposited permalloy film led to solid-phase epitaxial nucleation of compact disk-shaped island nanostructures decorating <110> ledges of the stepped surface, with either (2 [Formula: see text] 2) or ([Formula: see text]) R30° reconstructed flat top faces. High resolution scanning transmission electron microscopy analysis demonstrated fully coherent epitaxy of the islands with respect to the substrate, consistent with a well-matched CaF(2)-prototype structure associated with γ-FeSi(2), along perfect atomically sharp interfaces. Energy dispersive spectroscopy detected ternary composition of the islands, with Fe and Ni atoms confined to the islands, and no trace of segregation. Our magnetometry measurements revealed the superparamagnetic behavior of the silicide islands, with a blocking temperature around 30 K, reflecting the size, shape, and dilute arrangement of the islands in the assembly. MDPI 2021-05-16 /pmc/articles/PMC8155884/ /pubmed/34065681 http://dx.doi.org/10.3390/nano11051310 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bhukta, Anjan Horvitz, Dror Kohn, Amit Goldfarb, Ilan Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title | Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title_full | Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title_fullStr | Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title_full_unstemmed | Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title_short | Lattice-Match Stabilization and Magnetic Properties of Metastable Epitaxial Permalloy-Disilicide Nanostructures on a Vicinal Si(111) Substrate |
title_sort | lattice-match stabilization and magnetic properties of metastable epitaxial permalloy-disilicide nanostructures on a vicinal si(111) substrate |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8155884/ https://www.ncbi.nlm.nih.gov/pubmed/34065681 http://dx.doi.org/10.3390/nano11051310 |
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