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Magnetic Ordering and Spin-glass Behaviour of Carbon Nanoclusters

Rode, Andrei V; Madsen, Nathan; Christy, Andrew; Luther-Davies, Barry; Arcon, D; Zorko, A; Jaglicic, Z; Lau, Desmond W M; McCulloch, Dougal G

Description

Carbon nanoclusters produced by high-repetition-rate laser ablation of graphite and glassy carbon in Ar exhibits para- and ferromagnetic behaviour at low temperature. The results show that the degree of remanent order is strongly dependent on the magnetic history, i.e. whether the samples were cooled under zero-field or field conditions. Such behaviour is typical for a spin glass structure where the system can exist in many different roughly equivalent spin configurations. The spin-freezing...[Show more]

dc.contributor.authorRode, Andrei V
dc.contributor.authorMadsen, Nathan
dc.contributor.authorChristy, Andrew
dc.contributor.authorLuther-Davies, Barry
dc.contributor.authorArcon, D
dc.contributor.authorZorko, A
dc.contributor.authorJaglicic, Z
dc.contributor.authorLau, Desmond W M
dc.contributor.authorMcCulloch, Dougal G
dc.coverage.spatialBrisbane Australia
dc.date.accessioned2015-12-07T22:32:54Z
dc.date.createdJuly 3-7 2006
dc.identifier.isbn1424404533
dc.identifier.urihttp://hdl.handle.net/1885/23025
dc.description.abstractCarbon nanoclusters produced by high-repetition-rate laser ablation of graphite and glassy carbon in Ar exhibits para- and ferromagnetic behaviour at low temperature. The results show that the degree of remanent order is strongly dependent on the magnetic history, i.e. whether the samples were cooled under zero-field or field conditions. Such behaviour is typical for a spin glass structure where the system can exist in many different roughly equivalent spin configurations. The spin-freezing temperature is unusually high (50 - 300 K) compared with ≤ 15 K for typical spin glasses. The maximum in the zero-field magnetic susceptibility experiments and their field dependence indicate that there is competition between ferromagnetic and antiferromagnetic exchange pathways, accounting for the spin glass behavior and/or a low-dimensionality of the system.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE Inc)
dc.relation.ispartofseriesInternational Conference on Nanoscience and Nanotechnology (ICONN 2006)
dc.sourceProceedings of the 2006 International Conference on Nanoscience and Nanotechnology
dc.subjectKeywords: Ablation; Antiferromagnetic materials; Antiferromagnetism; Carbon; Ferromagnetic materials; Ferromagnetism; Glass; Graphite; Laser ablation; Magnetic materials; Magnetic properties; Magnetic susceptibility; Nanoclusters; Nanoscience; Nanostructured materi Ferromagnetic carbon; Magnetic carbon nanoclusters; Spin glass
dc.titleMagnetic Ordering and Spin-glass Behaviour of Carbon Nanoclusters
dc.typeConference paper
local.description.notesImported from ARIES
local.description.refereedYes
dc.date.issued2006
local.identifier.absfor020501 - Classical and Physical Optics
local.identifier.ariespublicationu8606713xPUB24
local.type.statusPublished Version
local.contributor.affiliationRode, Andrei V, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMadsen, Nathan, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationChristy, Andrew, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLuther-Davies, Barry, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationArcon, D, J. Stefan Institute
local.contributor.affiliationZorko, A, J. Stefan Institute
local.contributor.affiliationJaglicic, Z, Institute of Mathematics, Physics and Mechanics
local.contributor.affiliationLau, Desmond W M, RMIT University
local.contributor.affiliationMcCulloch, Dougal G, Royal Melbourne Institute of Technology
local.description.embargo2037-12-31
local.bibliographicCitation.startpage31
local.bibliographicCitation.lastpage34
local.identifier.doi10.1109/ICONN.2006.340542
dc.date.updated2015-12-07T10:25:33Z
local.identifier.scopusID2-s2.0-48749089380
CollectionsANU Research Publications

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