000136418 001__ 136418
000136418 005__ 20240826132401.0
000136418 0247_ $$2doi$$a10.1063/10.0026058
000136418 0248_ $$2sideral$$a139005
000136418 037__ $$aART-2024-139005
000136418 041__ $$aeng
000136418 100__ $$0(orcid)0000-0002-5999-341X$$aArauzo, Ana$$uUniversidad de Zaragoza
000136418 245__ $$aLow-temperature magnetism of Ln2Ba (Ln = Nd, Er, Ho) furoate-based polymeric chains: Slow relaxation, magnetic anisotropy and interactions
000136418 260__ $$c2024
000136418 5060_ $$aAccess copy available to the general public$$fUnrestricted
000136418 5203_ $$aThe synthesis, structure and magnetothermal properties of three new lanthanide 1D polymeric complexes, {[Ln2Ba(α-fur)8(H2O)4]}n for Ln = Nd (1), Er (2) and {[Ho2Ba(α-fur)8(H2O)4]⋅2H2O}n (3), based on carboxylic α-fur = C4H3OCOO ligands is reported. The α-furoate ligands consolidate zigzag chains formed by Ln2 dimers separated by Ba ions. Ab initio calculations, in combination with the fit of experimental static magnetization and heat capacity, predict the magnetic ground state, energy levels and magnetic interactions in these heteronuclear nanomagnets. Nd2Ba (1) presents two different coordination sites for Nd, with an orthorhombic magnetic ground state. Nd ions are coupled along the chain through a weak antiferromagnetic (AF) interaction J″/kB = −0.08 K. Er(III) ions in Er2Ba (2) present a highly axial ground state, forming magnetic dimers with an interaction of J′/kB = −8.6 K, while interdimer coupling along the chain is J″/kB = −0.28 K. The Ho2Ba (3) complex consists of a highly anisotropic quasi-doublet with a ΔHo/kB = 0.7 K gap. Non-Kramers Ho ions form magnetic dimers within the Ho2Ba cluster, coupled by an AF intradimer interaction J′/kB = −2.5 K. The three complexes exhibit in-field slow relaxation of the magnetization: 1 relaxes through an Orbach process at high temperatures [Ueff/kB = 60(1) K] evolving to quantum tunneling below 3 K [τQT = 0.05(1) s]; 2 exhibits a rapid Orbach-like process [τ0 = 8(6)⋅10–8 s and Ueff/kB = 10(2) K] and 3 shows a direct process [τ = 0.4(1) s].
000136418 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA$$9info:eu-repo/grantAgreement/ES/MICINN/PID2022-138492NB-I00
000136418 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000136418 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000136418 700__ $$aBartolomé, Elena
000136418 700__ $$0(orcid)0000-0002-9208-0807$$aLuzón, Javier
000136418 700__ $$aMelnic, Silvia
000136418 700__ $$aShova, Sergiu
000136418 700__ $$0(orcid)0000-0002-6517-1236$$aBartolomé, Juan
000136418 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000136418 773__ $$g50, 6 (2024), 452-466$$pLow temp. phys.$$tLOW TEMPERATURE PHYSICS$$x1063-777X
000136418 8564_ $$s1748681$$uhttps://zaguan.unizar.es/record/136418/files/texto_completo.pdf$$yPostprint
000136418 8564_ $$s1086259$$uhttps://zaguan.unizar.es/record/136418/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000136418 909CO $$ooai:zaguan.unizar.es:136418$$particulos$$pdriver
000136418 951__ $$a2024-08-22-13:17:43
000136418 980__ $$aARTICLE