Magnetisation dynamics of Fe nanoclusters exchange-coupled to magnetic substrates

C. Binns; F. Sirotti; H. Cruguel; S. H. Baker; P. Prieto; J. D. Bellier; S. C. Thornton

doi:10.1002/pssa.200405439

Magnetisation dynamics of Fe nanoclusters exchange-coupled to magnetic substrates

C. Binns, F. Sirotti, H. Cruguel, S. H. Baker, P. Prieto, J. D. Bellier, S. C. Thornton

Research output: Contribution to journal › Article › peer-review

Abstract

Synchrotron radiation was used to study exposed Fe nanoclusters with controlled sizes in the size range 140-270 atoms (1.5-1.8 nm) deposited in situ from a gas aggregation source on to magnetic vitrovac amorphous ribbons. Magnetic linear dichroism in the angular distribution (MLDAD) of the Fe 3p core level photoemission was used to show that the clusters are exchange-coupled to the substrate with an interface molecular field of about 20 T. The switching dynamics was studied on the nanosecond timescale by time-resolved spin-polarised photoemission. At low coverages, below the percolation threshold, when the film consists of separated islands the switching dynamics of the cluster islands is identical to the clean substrate. At around the percolation threshold, however, the data indicates that the magnetic reversal propagates faster in the cluster film than in the substrate.

Original language	English
Pages (from-to)	3285-3292
Number of pages	8
Journal	physica status solidi (a)
Volume	201
Issue number	15
DOIs	https://doi.org/10.1002/pssa.200405439
Publication status	Published - 1 Dec 2004
Externally published	Yes

Access to Document

10.1002/pssa.200405439

Cite this

@article{71adfbf0d23b489c8db9c379ef615461,

title = "Magnetisation dynamics of Fe nanoclusters exchange-coupled to magnetic substrates",

abstract = "Synchrotron radiation was used to study exposed Fe nanoclusters with controlled sizes in the size range 140-270 atoms (1.5-1.8 nm) deposited in situ from a gas aggregation source on to magnetic vitrovac amorphous ribbons. Magnetic linear dichroism in the angular distribution (MLDAD) of the Fe 3p core level photoemission was used to show that the clusters are exchange-coupled to the substrate with an interface molecular field of about 20 T. The switching dynamics was studied on the nanosecond timescale by time-resolved spin-polarised photoemission. At low coverages, below the percolation threshold, when the film consists of separated islands the switching dynamics of the cluster islands is identical to the clean substrate. At around the percolation threshold, however, the data indicates that the magnetic reversal propagates faster in the cluster film than in the substrate.",

author = "C. Binns and F. Sirotti and H. Cruguel and Baker, \{S. H.\} and P. Prieto and Bellier, \{J. D.\} and Thornton, \{S. C.\}",

year = "2004",

month = dec,

day = "1",

doi = "10.1002/pssa.200405439",

language = "English",

volume = "201",

pages = "3285--3292",

journal = "physica status solidi (a)",

issn = "0031-8965",

number = "15",

}

TY - JOUR

T1 - Magnetisation dynamics of Fe nanoclusters exchange-coupled to magnetic substrates

AU - Binns, C.

AU - Sirotti, F.

AU - Cruguel, H.

AU - Baker, S. H.

AU - Prieto, P.

AU - Bellier, J. D.

AU - Thornton, S. C.

PY - 2004/12/1

Y1 - 2004/12/1

N2 - Synchrotron radiation was used to study exposed Fe nanoclusters with controlled sizes in the size range 140-270 atoms (1.5-1.8 nm) deposited in situ from a gas aggregation source on to magnetic vitrovac amorphous ribbons. Magnetic linear dichroism in the angular distribution (MLDAD) of the Fe 3p core level photoemission was used to show that the clusters are exchange-coupled to the substrate with an interface molecular field of about 20 T. The switching dynamics was studied on the nanosecond timescale by time-resolved spin-polarised photoemission. At low coverages, below the percolation threshold, when the film consists of separated islands the switching dynamics of the cluster islands is identical to the clean substrate. At around the percolation threshold, however, the data indicates that the magnetic reversal propagates faster in the cluster film than in the substrate.

AB - Synchrotron radiation was used to study exposed Fe nanoclusters with controlled sizes in the size range 140-270 atoms (1.5-1.8 nm) deposited in situ from a gas aggregation source on to magnetic vitrovac amorphous ribbons. Magnetic linear dichroism in the angular distribution (MLDAD) of the Fe 3p core level photoemission was used to show that the clusters are exchange-coupled to the substrate with an interface molecular field of about 20 T. The switching dynamics was studied on the nanosecond timescale by time-resolved spin-polarised photoemission. At low coverages, below the percolation threshold, when the film consists of separated islands the switching dynamics of the cluster islands is identical to the clean substrate. At around the percolation threshold, however, the data indicates that the magnetic reversal propagates faster in the cluster film than in the substrate.

U2 - 10.1002/pssa.200405439

DO - 10.1002/pssa.200405439

M3 - Article

AN - SCOPUS:11444250922

SN - 0031-8965

VL - 201

SP - 3285

EP - 3292

JO - physica status solidi (a)

JF - physica status solidi (a)

IS - 15

ER -

Magnetisation dynamics of Fe nanoclusters exchange-coupled to magnetic substrates

Abstract

Access to Document

Fingerprint

Cite this