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http://hdl.handle.net/10261/207875
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dc.contributor.author | Bartolomé, Elena | es_ES |
dc.contributor.author | Arauzo, Ana B. | es_ES |
dc.contributor.author | Luzón, Javier | es_ES |
dc.contributor.author | Melnic, S. | es_ES |
dc.contributor.author | Shova, S. | es_ES |
dc.contributor.author | Prodius, D. | es_ES |
dc.contributor.author | Bartolomé, Juan | es_ES |
dc.contributor.author | Amann, Andreas | es_ES |
dc.contributor.author | Nallaiyan, Manivannan | es_ES |
dc.contributor.author | Spagna, Stefano | es_ES |
dc.date.accessioned | 2020-04-16T11:16:36Z | - |
dc.date.available | 2020-04-16T11:16:36Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Dalton Transactions 48(15): 5022-5034 (2019) | es_ES |
dc.identifier.issn | 1477-9226 | - |
dc.identifier.uri | http://hdl.handle.net/10261/207875 | - |
dc.description.abstract | We report the synthesis, crystal structure and magnetic properties of a new heteronuclear polymeric complex based on non-Kramers Tb ions and carboxylic α-fur = C4H3OCOO ligands: {[Tb2Ba(α-fur)8(H2O)4]·2H2O}n. The α-furoate ligands consolidate 1D zig-zag chains running along the c-axis, formed by Tb2 dimers separated by Ba ions. Ab initio calculations, in combination with the fit of experimental data, predict that the single-ion magnetic ground state is highly anisotropic (Image ID:c8dt05044a-t1.gif) and consists of a quasi-doublet with a ΔTb/kB = 3.22 K gap, well separated from the next excited state, while the gap for the Tb2 dimer is Δ2Tb/kB = 2.58 K. Static magnetization and heat capacity measurements show that, magnetically, the system can be modeled as dimers of non-Kramers Tb ions, coupled by an antiferromagnetic intradimer interaction J′*/kB = −1.6 K. Dipolar interactions couple the Tb ions in the dimer with their first neighbour ions along the chain, with J′′*/kB = −0.15 K, and with the surrounding ions out of the chain, with maximum J′′′*/kB = −0.03 K. Ac susceptibility measurements in H = 0 performed down to 50 mK temperatures have enabled us to observe slow relaxation of magnetization, with an Orbach-like activation energy of U/kB = 1.1 K. It is assigned to the sluggish response of the 3D spin system due to a short-range ordering, possibly enhanced by the presence of disorder caused by defects in the polymeric chains. Under the application of a magnetic field, the system slowly relaxes by two distinct direct processes, strongly affected by a phonon bottleneck effect. We discuss the different relaxational phenomenology of the new complex in comparison with that of the isostructural {[Dy2Ba(α-fur)8(H2O)4]·2H2O}n, differing only in the Kramers nature of the ions, and the mononuclear {Ln(α-fur)3(H2O)3}n (Ln = Tb, Dy) complexes, previously reported. | es_ES |
dc.description.sponsorship | This work has been financed by MECOM Projects MAT2014-53921-R, MAT2015-68200-C02-2-P and MAT2017-83468-R. We are grateful to Javier Rubín for his critical reading of the manuscript. D. P. thanks the Alexander von Humboldt (AvH) Foundation for financial support. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Royal Society of Chemistry (UK) | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2014-53921-R | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2015-68200-C2-2-P | es_ES |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-83468-R | es_ES |
dc.relation | MAT2017-83468-R/AEI/10.13039/501100011033 | es_ES |
dc.rights | closedAccess | es_ES |
dc.title | Slow relaxation in a {Tb2Ba(α-fur)8}n polymer with Ln = Tb(iii) non-Kramers ions | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1039/C8DT05044A | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | https://doi.org/10.1039/C8DT05044A | es_ES |
dc.identifier.e-issn | 1477-9234 | - |
dc.contributor.funder | Ministerio de Ciencia, Innovación y Universidades (España) | es_ES |
dc.contributor.funder | Ministerio de Economía y Competitividad (España) | es_ES |
dc.contributor.funder | Agencia Estatal de Investigación (España) | es_ES |
dc.contributor.funder | Alexander von Humboldt Foundation | es_ES |
dc.relation.csic | Sí | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100003329 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100011033 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/100005156 | es_ES |
dc.contributor.orcid | Bartolomé, Elena [0000-0001-5108-0977] | es_ES |
dc.contributor.orcid | Arauzo, Ana B. [0000-0002-5999-341X] | es_ES |
dc.contributor.orcid | Luzón, Javier [0000-0002-9208-0807] | es_ES |
dc.contributor.orcid | Shova, S. [0000-0002-1222-4373] | es_ES |
dc.contributor.orcid | Prodius, D. [0000-0002-9967-6021] | es_ES |
dc.identifier.pmid | 30916067 | - |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | No Fulltext | - |
item.cerifentitytype | Publications | - |
item.openairetype | artículo | - |
item.languageiso639-1 | en | - |
item.grantfulltext | none | - |
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