Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets
In this work we review the Co 2 III Ln 2 III family of compounds reported up to date that shows SMM features. The vast majority of them show a butterfly arrangement with Ln III ions placed at the body positions. The number of Dy III examples constitutes the majority, probably because of the intrinsi...
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todo:paper_14341948_v2018_n20_p2067_Funes2023-10-03T16:14:21Z Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets Funes, A.V. Alborés, P. Cobalt Lanthanides Magnetic properties Single-molecule magnets Slow relaxation In this work we review the Co 2 III Ln 2 III family of compounds reported up to date that shows SMM features. The vast majority of them show a butterfly arrangement with Ln III ions placed at the body positions. The number of Dy III examples constitutes the majority, probably because of the intrinsic properties of this lanthanide ion regarding SMMs characteristics. Butterfly complexes have a SAP geometry around Ln III ions with a variety of distortion degrees. However, when looking at the key U eff parameter trend through this family of complexes, it becomes clear that a pure geometrical consideration is not enough to explain it. Ab initio based calculations provide evidence of highly anisotropic m J ground states for complexes where Ln III = Dy III , pointing to exclusively m J = 15/2 ground Kramers doublets. These calculations also agree with the thermally activated relaxation involving the first excited state and, in some examples where multiple relaxation pathways are observed, higher excited states. A few examples prove that Raman and/or direct mechanisms cannot be discarded a priori. Only two examples of isostructural Ln III families of the same Co 2 III Ln 2 III complex can be found. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14341948_v2018_n20_p2067_Funes |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cobalt Lanthanides Magnetic properties Single-molecule magnets Slow relaxation |
| spellingShingle |
Cobalt Lanthanides Magnetic properties Single-molecule magnets Slow relaxation Funes, A.V. Alborés, P. Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| topic_facet |
Cobalt Lanthanides Magnetic properties Single-molecule magnets Slow relaxation |
| description |
In this work we review the Co 2 III Ln 2 III family of compounds reported up to date that shows SMM features. The vast majority of them show a butterfly arrangement with Ln III ions placed at the body positions. The number of Dy III examples constitutes the majority, probably because of the intrinsic properties of this lanthanide ion regarding SMMs characteristics. Butterfly complexes have a SAP geometry around Ln III ions with a variety of distortion degrees. However, when looking at the key U eff parameter trend through this family of complexes, it becomes clear that a pure geometrical consideration is not enough to explain it. Ab initio based calculations provide evidence of highly anisotropic m J ground states for complexes where Ln III = Dy III , pointing to exclusively m J = 15/2 ground Kramers doublets. These calculations also agree with the thermally activated relaxation involving the first excited state and, in some examples where multiple relaxation pathways are observed, higher excited states. A few examples prove that Raman and/or direct mechanisms cannot be discarded a priori. Only two examples of isostructural Ln III families of the same Co 2 III Ln 2 III complex can be found. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| format |
JOUR |
| author |
Funes, A.V. Alborés, P. |
| author_facet |
Funes, A.V. Alborés, P. |
| author_sort |
Funes, A.V. |
| title |
Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| title_short |
Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| title_full |
Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| title_fullStr |
Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| title_full_unstemmed |
Recent Developments in Co III 2 Ln III 2 Single-Molecule Magnets |
| title_sort |
recent developments in co iii 2 ln iii 2 single-molecule magnets |
| url |
http://hdl.handle.net/20.500.12110/paper_14341948_v2018_n20_p2067_Funes |
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AT funesav recentdevelopmentsincoiii2lniii2singlemoleculemagnets AT alboresp recentdevelopmentsincoiii2lniii2singlemoleculemagnets |
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