000046910 001__ 46910
000046910 005__ 20210121114514.0
000046910 0247_ $$2doi$$a10.1103/PhysRevB.92.064411
000046910 0248_ $$2sideral$$a91964
000046910 037__ $$aART-2015-91964
000046910 041__ $$aeng
000046910 100__ $$0(orcid)0000-0002-6045-3576$$aBadía-Romano, L.$$uUniversidad de Zaragoza
000046910 245__ $$aIntracluster interactions in butterfly {Fe3 LnO2} molecules with the non-Kramers ions Tb(III) and Ho(III)
000046910 260__ $$c2015
000046910 5060_ $$aAccess copy available to the general public$$fUnrestricted
000046910 5203_ $$aThe intracluster exchange interactions within the "butterfly" Fe3Ln(µ3-O)2(CCl3COO)8(H2O)(THF)3] molecules, where Ln(III) represents a lanthanide cation, have been determined by a combination of x-ray magnetic circular dichroism (XMCD) and vibrating sample magnetometry (VSM) along with an interaction model. We have studied the compounds with Ln=Tb and Ho, both non-Kramers lanthanides and with high uniaxial anisotropy, and Ln=Lu(III) and Y(III) as pseudolanthanides, which supply nonmagnetic Ln reference cases. At low temperature, the three Fe atoms can be considered as a self-unit with total spin SFe3=5/2. Using the element selectivity of the XMCD magnetometry, measured at the Ln L2,3 edges, together with the VSM measurements, the local magnetization of the Ln ion and the Fe3 subcluster, as a function of the field and low temperature (T˜2.5K), has been determined separately. These results are described quantitatively in the framework of a theoretical model based on an effective spin Hamiltonian, which considers the competing effects of intracluster interactions and the external applied magnetic field. The Ln-Fe3 exchange interaction within the {Fe3LnO2} cluster has been determined to be antiferromagnetic, in both Tb and Ho compounds, with JFeTb/kB=-0.13(1)K and JFeHo/kB=-0.18(1)K, respectively. In both cases, a field-induced reorientation of the Fe3 and Ln spins from antiparallel to parallel orientation takes place at a threshold field µ0H=1.1 and 2 T, for the {Fe3TbO2} and {Fe3HoO2} compounds, respectively. By comparison with other compounds of the series with uniaxial anisotropy, it is concluded that the polarizability of the Fe3 subcluster magnetic moment decreases in the trend {Fe3YO2}¿{Fe3TbO2}¿{Fe3HoO2}¿{Fe3DyO2}, because of the increasing opposition of the exchange antiferromagnetic field caused by the Ln ion. In the Ln=Tb, Ho, and Dy, the magnetization of the whole molecule is dominated by the anisotropy of the Ln ion. The intracluster Fe3-Ln exchange interactions are very weak compared to the Ln ligand field and Fe-Fe exchange interactions.
000046910 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53921-R$$9info:eu-repo/grantAgreement/ES/MINECO/MAT2011-23791$$9info:eu-repo/grantAgreement/ES/MICINN/MAT2011-27233-C02-02$$9info:eu-repo/grantAgreement/ES/DGA/IMANA-E34
000046910 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000046910 590__ $$a3.718$$b2015
000046910 591__ $$aPHYSICS, CONDENSED MATTER$$b16 / 67 = 0.239$$c2015$$dQ1$$eT1
000046910 592__ $$a2.377$$b2015
000046910 593__ $$aElectronic, Optical and Magnetic Materials$$c2015$$dQ1
000046910 593__ $$aCondensed Matter Physics$$c2015$$dQ1
000046910 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000046910 700__ $$0(orcid)0000-0003-1029-3751$$aRubín, J.$$uUniversidad de Zaragoza
000046910 700__ $$0(orcid)0000-0002-0047-1772$$aBartolomé, F.$$uUniversidad de Zaragoza
000046910 700__ $$0(orcid)0000-0002-6517-1236$$aBartolomé, J.$$uUniversidad de Zaragoza
000046910 700__ $$0(orcid)0000-0002-9208-0807$$aLuzón, J.
000046910 700__ $$aProdius, D.
000046910 700__ $$aTurta, C.
000046910 700__ $$aMereacre, V.
000046910 700__ $$aWilhelm, F.
000046910 700__ $$aRogalev, A.
000046910 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000046910 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000046910 773__ $$g92, 6 (2015), 064411 [13 pp.]$$pPhys. Rev. B, Condens. matter mater. phys.$$tPhysical Review B$$x1098-0121
000046910 8564_ $$s835787$$uhttps://zaguan.unizar.es/record/46910/files/texto_completo.pdf$$yVersión publicada
000046910 8564_ $$s125533$$uhttps://zaguan.unizar.es/record/46910/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000046910 909CO $$ooai:zaguan.unizar.es:46910$$particulos$$pdriver
000046910 951__ $$a2021-01-21-10:58:44
000046910 980__ $$aARTICLE