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Low temperature structural transitions in dipolar hard spheres: the influence on magnetic properties

2015-06-01Journal article Restricted access
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dc.contributor.authorIvanov, A.O.
dc.contributor.authorKantorovich, Sofia S.
dc.contributor.authorRovigatti, Lorenzo
dc.contributor.authorTavares, Jose
dc.contributor.authorSCIORTINO, Francesco
dc.date.accessioned2016-03-18T14:26:40Z
dc.date.available2016-03-18T14:26:40Z
dc.date.issued2015-06-01
dc.description.abstractWe investigate the structural chain-to-ring transition at low temperature in a gas of dipolar hard spheres (DRS). Due to the weakening of entropic contribution, ring formation becomes noticeable when the effective dipole-dipole magnetic interaction increases, It results in the redistribution of particles from usually observed flexible chains into flexible rings. The concentration (rho) of DI-IS plays a crucial part in this transition: at a very low rho only chains and rings are observed, whereas even a slight increase of the volume fraction leads to the formation of branched or defect structures. As a result, the fraction of DHS aggregated in defect-free rings turns out to be a non-monotonic function of rho. The average ring size is found to be a slower increasing function of rho when compared Lo that of chains. Both theory and computer simulations confirm the dramatic influence of the ring formation on the rho-dependence of the initial magnetic susceptibility (chi) when the temperature decreases. The rings clue to their zero total dipole moment are irresponsive to a weak magnetic field and drive to the strong decrease of the initial magnetic susceptibility. (C) 2014 Elsevier B.V. All rights reserved.pt_PT
dc.identifier.citationIVANOV, A.O.; [et al.] - Low temperature structural transitions in dipolar hard spheres: the influence on magnetic properties. Journal of Magnetism and Magnetic Materials. ISSN.0304-8853. Vol. 383 (2015), pp. 272-276pt_PT
dc.identifier.doi10.1016/j.jmmm.2014.10.013pt_PT
dc.identifier.issn0304-8853
dc.identifier.issn1873-4766
dc.identifier.urihttp://hdl.handle.net/10400.21/5912
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier Science BVpt_PT
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0304885314009123pt_PT
dc.subjectInitial magnetic susceptibilitypt_PT
dc.subjectLow temperaturept_PT
dc.subjectStructural transitionpt_PT
dc.subjectDipolar hard spherespt_PT
dc.subjectChainpt_PT
dc.subjectRingpt_PT
dc.titleLow temperature structural transitions in dipolar hard spheres: the influence on magnetic propertiespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage276pt_PT
oaire.citation.startPage272pt_PT
oaire.citation.volume383pt_PT
person.familyNameRovigatti
person.familyNameTavares
person.familyNameSCIORTINO
person.givenNameLorenzo
person.givenNameJose
person.givenNameFrancesco
person.identifier.ciencia-id371D-51C6-975C
person.identifier.orcid0000-0001-5017-2829
person.identifier.orcid0000-0002-1509-9707
person.identifier.orcid0000-0002-2418-2713
person.identifier.ridA-2891-2009
person.identifier.scopus-author-id35621140500
person.identifier.scopus-author-id7005775345
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8b210448-ead8-4774-8314-98cfa9d902ee
relation.isAuthorOfPublication21fb8ec6-5b23-4df8-ba97-32256495d24d
relation.isAuthorOfPublication93c349ba-3823-4ecd-849d-be1538627a33
relation.isAuthorOfPublication.latestForDiscovery21fb8ec6-5b23-4df8-ba97-32256495d24d

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