دورية أكاديمية
Magnetic chains of Fe3 clusters in the {Fe3YO2} butterfly molecular compound
| العنوان: | Magnetic chains of Fe3 clusters in the {Fe3YO2} butterfly molecular compound |
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| المؤلفون: | Rubín, Javier, Badía-Romano, L., Luis, Fernando, Mereacre, V., Prodius, D., Arauzo, Ana B., Bartolomé, Fernando, Bartolomé, Juan |
| المساهمون: | Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission |
| بيانات النشر: | Royal Society of Chemistry (UK) |
| سنة النشر: | 2020 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| الوصف: | The “butterfly” molecule [Fe3Y(μ3-O)2(CCl3COO)8(H2O)(THF)3] (in brief {Fe3YO2}) includes three Fe3+ ions which build a robust Fe3 cluster with a strong intracluster antiferromagnetic exchange Image ID:c9dt04816b-t1.gif and a total spin S = 5/2. It represents the starting magnetic system to study further interactions with magnetic rare earths when Y is replaced with lanthanides. We present heat capacity and equilibrium susceptibility measurements below 2 K, which show that each cluster has a sizeable magnetic anisotropy pointing to the existence of intercluster interactions. However, no phase transition to a long-range magnetically ordered phase is observed down to 20 mK. The intercluster interaction is analysed in the framework of the one-dimensional Blume–Capel model with an antiferromagnetic chain interaction constant J/kB = −40(2) mK between Fe3 cluster spins, and a uniaxial anisotropy with parameter D/kB = −0.56(3) K. This is associated to single chains of Fe3 clusters oriented along the shortest intercluster distances displayed by the crystal structure of {Fe3YO2}. Ac susceptibility measurements reveal that the magnetic relaxation is dominated by a quantum tunnelling process below 0.2 K, and by thermally activated processes above this temperature. The experimental activation energy of this single chain magnet, Ea/kB = 3.4(6) K, can be accounted for by the combination of contributions arising from single-molecule magnetic anisotropy and spin–spin correlations along the chains. ; We acknowledge financial support from the MCINN projects MAT2017-83468-R, RTI2018-096075-B-C21 and PCI2018-093116, as well as COST Action on Molecular Spintronics (CA15128, MOLSPIN). The authors would like to acknowledge the use of the Servicio General de Apoyo a la Investigación-SAI, Universidad de Zaragoza, and Aragonese E12_17R RASMIA and E09_17R Q-MAD (co-funded by Fondo Social Europeo), and of the European Union FEDER (ES). ; Peer reviewed |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1477-9226 1477-9234 |
| العلاقة: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/MAT2017-83468-R; MAT2017-83468-R/AEI/10.13039/501100011033; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096075-B-C21; RTI2018-096075-B-C21/AEI/10.13039/501100011033; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PCI2018-093116; PCI2018-093116/AEI/10.13039/501100011033; https://doi.org/10.1039/C9DT04816BTest; Sí; Dalton Transactions 49(9): 2979-2988 (2020); http://hdl.handle.net/10261/219013Test; http://dx.doi.org/10.13039/501100000780Test; http://dx.doi.org/10.13039/501100011033Test |
| DOI: | 10.1039/C9DT04816B |
| DOI: | 10.13039/501100000780 |
| DOI: | 10.13039/501100011033 |
| الإتاحة: | https://doi.org/10.1039/C9DT04816BTest https://doi.org/10.13039/501100000780Test https://doi.org/10.13039/501100011033Test http://hdl.handle.net/10261/219013Test |
| حقوق: | none |
| رقم الانضمام: | edsbas.5ECA1B14 |
| قاعدة البيانات: | BASE |
| تدمد: | 14779226 14779234 |
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| DOI: | 10.1039/C9DT04816B |