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Slow Relaxation of the Magnetization on Frustrated Triangular FeIII Units with S= 1/2 Ground State: The Effect of the Highly Ordered Crystal Lattice and the Counteranions

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Slow Relaxation of the Magnetization on Frustrated Triangular FeIII Units with S= 1/2 Ground State: The Effect of the Highly Ordered Crystal Lattice and the Counteranions

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dc.contributor.author	Cañon-Mancisidor, Walter
dc.contributor.author	Hermosilla-Ibáñez, Patricio
dc.contributor.author	Spodine, Evgenia
dc.contributor.author	Paredes-García, Verónica
dc.contributor.author	Gómez García, Carlos José
dc.contributor.author	Mínguez Espallargas, Guillermo
dc.contributor.author	Venegas-Yazigi, Diego
dc.date.accessioned	2021-11-03T14:28:09Z
dc.date.available	2022-09-15T04:45:05Z
dc.date.issued	2021
dc.identifier.citation	Cañon-Mancisidor, Walter Hermosilla-Ibáñez, Patricio Spodine, Evgenia Paredes-García, Verónica Gómez García, Carlos José Mínguez Espallargas, Guillermo Venegas-Yazigi, Diego 2021 Slow Relaxation of the Magnetization on Frustrated Triangular FeIII Units with S= 1/2 Ground State: The Effect of the Highly Ordered Crystal Lattice and the Counteranions Crystal Growth & Design 21 11 6213 6222
dc.identifier.uri	https://hdl.handle.net/10550/80651
dc.description.abstract	In order to understand how the different arrangements of highly ordered triangular FeIII S = 1/2 systems with various types of diamagnetic and paramagnetic anions affect their static and dynamic magnetic properties, we have obtained by solvothermal synthesis four new μ3-oxido trinuclear FeIII compounds, [Fe3O(Ac)6(AcNH2)3][BF4]·(CH3CONH2)0.5(H2O)0.5 (1-BF4), [Fe3O(Ac)6(AcNH2)3][GaCl4] (1-GaCl4), [Fe3O(Ac)6(AcNH2)3][FeCl4] (1-FeCl4) and [Fe3O(Ac)6(AcNH2)3][FeBr4] (1-FeBr4), where, Ac- = CH3COO- and AcNH2 = CH3CONH2. The organization of the triangular units is very varied, from segregated stacks to eclipsed equilateral triangular [Fe3O]+ units along the c-axis with intercalated [MX4]- units. The ordering of the triangular species together with disposition of the counteranions (intercalated or not) affects the static and dynamic magnetic properties of the [Fe3O]+ systems. Magnetic dc data were satisfactorily fitted with a HDvV spin Hamiltonian also considering the existence of anisotropic phenomena (antisymmetric exchange and intermolecular interactions), in order to model the low temperature region. From the antisymmetric exchange, we were able to obtain Δ (Ueff), which was used to model and rationalize the dynamic magnetic properties of these systems, reflecting that Orbach and Raman processes define the relaxation mechanism of these systems.
dc.language.iso	eng
dc.relation.ispartof	Crystal Growth & Design, 2021, vol. 21, num. 11, p. 6213-6222
dc.subject	Cristalls
dc.subject	Química
dc.title	Slow Relaxation of the Magnetization on Frustrated Triangular FeIII Units with S= 1/2 Ground State: The Effect of the Highly Ordered Crystal Lattice and the Counteranions
dc.type	journal article	es_ES
dc.date.updated	2021-11-03T14:28:09Z
dc.identifier.doi	10.1021/acs.cgd.1c00640
dc.identifier.idgrec	147962
dc.embargo.terms	1 year
dc.rights.accessRights	open access	es_ES