Proteresis in Co:CoO core-shell nanoclusters

X. H. Wei, R. Skomski, Z. G. Sun, David J Sellmyer

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The magnetism of ultrasmall Co:CoO core-shell nanoclusters is investigated. The structures, produced by cluster-beam deposition, have Co core sizes ranging from 1 to 7 nm and a CoO shell thickness of about 3 nm. Hysteresis loops as well as zero-field-cooled and field-cooled magnetization curves have been measured and a striking feature of the nanostructures is the existence of proteretic (clockwise) rather than hysteretic loops in the core-size range from 3 to 4 nm. The proteretic behavior and its particle-size dependence reflect a subtle interplay between various anisotropies and exchange interactions in the Co and CoO phases and at the Co-CoO interface.

Original languageEnglish (US)
Article number07D514
JournalJournal of Applied Physics
Volume103
Issue number7
DOIs
StatePublished - Apr 21 2008

Fingerprint

nanoclusters
hysteresis
magnetization
anisotropy
curves
interactions

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Proteresis in Co:CoO core-shell nanoclusters. / Wei, X. H.; Skomski, R.; Sun, Z. G.; Sellmyer, David J.

In: Journal of Applied Physics, Vol. 103, No. 7, 07D514, 21.04.2008.

Research output: Contribution to journalArticle

Wei, X. H. ; Skomski, R. ; Sun, Z. G. ; Sellmyer, David J. / Proteresis in Co:CoO core-shell nanoclusters. In: Journal of Applied Physics. 2008 ; Vol. 103, No. 7.
@article{e17e2631cbcb4a1c81d1f189bfe85f51,
title = "Proteresis in Co:CoO core-shell nanoclusters",
abstract = "The magnetism of ultrasmall Co:CoO core-shell nanoclusters is investigated. The structures, produced by cluster-beam deposition, have Co core sizes ranging from 1 to 7 nm and a CoO shell thickness of about 3 nm. Hysteresis loops as well as zero-field-cooled and field-cooled magnetization curves have been measured and a striking feature of the nanostructures is the existence of proteretic (clockwise) rather than hysteretic loops in the core-size range from 3 to 4 nm. The proteretic behavior and its particle-size dependence reflect a subtle interplay between various anisotropies and exchange interactions in the Co and CoO phases and at the Co-CoO interface.",
author = "Wei, {X. H.} and R. Skomski and Sun, {Z. G.} and Sellmyer, {David J}",
year = "2008",
month = "4",
day = "21",
doi = "10.1063/1.2829239",
language = "English (US)",
volume = "103",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "7",

}

TY - JOUR

T1 - Proteresis in Co:CoO core-shell nanoclusters

AU - Wei, X. H.

AU - Skomski, R.

AU - Sun, Z. G.

AU - Sellmyer, David J

PY - 2008/4/21

Y1 - 2008/4/21

N2 - The magnetism of ultrasmall Co:CoO core-shell nanoclusters is investigated. The structures, produced by cluster-beam deposition, have Co core sizes ranging from 1 to 7 nm and a CoO shell thickness of about 3 nm. Hysteresis loops as well as zero-field-cooled and field-cooled magnetization curves have been measured and a striking feature of the nanostructures is the existence of proteretic (clockwise) rather than hysteretic loops in the core-size range from 3 to 4 nm. The proteretic behavior and its particle-size dependence reflect a subtle interplay between various anisotropies and exchange interactions in the Co and CoO phases and at the Co-CoO interface.

AB - The magnetism of ultrasmall Co:CoO core-shell nanoclusters is investigated. The structures, produced by cluster-beam deposition, have Co core sizes ranging from 1 to 7 nm and a CoO shell thickness of about 3 nm. Hysteresis loops as well as zero-field-cooled and field-cooled magnetization curves have been measured and a striking feature of the nanostructures is the existence of proteretic (clockwise) rather than hysteretic loops in the core-size range from 3 to 4 nm. The proteretic behavior and its particle-size dependence reflect a subtle interplay between various anisotropies and exchange interactions in the Co and CoO phases and at the Co-CoO interface.

UR - http://www.scopus.com/inward/record.url?scp=42149143571&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=42149143571&partnerID=8YFLogxK

U2 - 10.1063/1.2829239

DO - 10.1063/1.2829239

M3 - Article

VL - 103

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 7

M1 - 07D514

ER -