Low-temperature magnetic interactions in the “butterfly”-type {Fe3GdO2} compound: The persistence of magnetic chains

Rubín, J. (Universidad de Zaragoza) ; Arauzo, A. (Universidad de Zaragoza) ; Bartolomé, F. ; Prodius, D. ; Bartolomé, J.

Resumen: Heat capacity measurements on the Ln = Gd case of the butterfly molecule series [Fe3Ln(μ3–O)2 (CCl3COO)8(H2O)(THF)3], in brief {Fe3LnO2}, are presented. In the previously studied {Fe3YO2} butterfly, where the magnetic properties stem only from the Fe3+ ions, magnetic chains of spin-5/2 Fe3Y clusters had been identified and described. The substitution of the nonmagnetic Y3+ ion by the magnetic Gd3+ adds magnetic interactions to the clusters, but not magnetic anisotropy. The heat capacity measurement shows an excess over the contribution of the antiferromagnetically coupled Fe3Gd magnetic clusters at very low temperature, which can be described as magnetic spin-1 chains using a Blume–Capel model. The intercluster interaction constant Jch=−55(5) mK is very similar to that of {Fe3YO2}, which shows that the interaction is mainly controlled by the magnitude of the cluster’s magnetic moment.

Idioma: Inglés

DOI: 10.1063/10.0026057

Año: 2024

Publicado en: LOW TEMPERATURE PHYSICS 50, 6 (2024), 446-451
ISSN: 1063-777X

Financiación: info:eu-repo/grantAgreement/ES/DGA/E12-20R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PID2020-115159GB-I00

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)