Ferromagnetic stability in Fe nanodot assemblies on Cu(111) induced by indirect coupling through the substrate

Ferromagnetic stability in Fe nanodot assemblies on Cu(111) induced by indirect coupling through the substrate

We report collective ferromagnetic behavior with high Curie temperatures (T(c)) in Fe dot assemblies supported by the Cu(111) surface. Our ability to tune the average size and spacing of the individual dots allows us to conclude that enhanced magnetic anisotropy cannot account for this high-T(c) fer...

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Veröffentlicht in:Physical review letters 2004-06, Vol.92 (23), p.237201.1-237201.4, Article 237201
Hauptverfasser: PIERCE, J. P, TORIJA, M. A, GAI, Z, SHI, Junren, SCHULTHESS, T. C, FARNAN, G. A, WENDELKEN, J. F, PLUMMER, E. W, SHEN, J
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
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container_end_page 237201.4
container_issue 23
container_start_page 237201.1
container_title Physical review letters
container_volume 92
creator PIERCE, J. P
TORIJA, M. A
GAI, Z
SHI, Junren
SCHULTHESS, T. C
FARNAN, G. A
WENDELKEN, J. F
PLUMMER, E. W
SHEN, J
description We report collective ferromagnetic behavior with high Curie temperatures (T(c)) in Fe dot assemblies supported by the Cu(111) surface. Our ability to tune the average size and spacing of the individual dots allows us to conclude that enhanced magnetic anisotropy cannot account for this high-T(c) ferromagnetic order. Because our Monte Carlo simulations have ruled out the dipolar interaction as the dominant factor in this system, we attribute the origin of the ferromagnetic order to indirect exchange coupling via the Cu(111) substrate.
doi_str_mv 10.1103/physrevlett.92.237201
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Physics
title Ferromagnetic stability in Fe nanodot assemblies on Cu(111) induced by indirect coupling through the substrate
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