INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Exploring the Slow Relaxation of the Magnetization in CoIII-Decorated {DyIII2} Units
Autor/es:
EVA RENTSCHLER; ALEJANDRO V. FUNES; PABLO ALBORÉS; LUCA CARRELLA
Revista:
CHEMISTRY-A EUROPEAN JOURNAL
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2016 vol. 22 p. 14308 - 14308
ISSN:
0947-6539
Resumen:
We have prepared and structurally characterized a new member of the butterfly-like {CoIII2DyIII2} single-molecule magnets (SMMs) through further CoIII decoration, with the formula [CoIII4DyIII2(OH)2(teaH)2(tea)2(Piv)6] (teaH3=triethanolamine; Piv=trimethylacetate or pivalate). Direct current (DC) susceptibility and magnetization measurements were performed allowing the extraction of possible crystal-field parameters. A simple electrostatic modeling shows reasonable agreement with experimental data. Alternating current (AC) susceptibility measurements under a zero DC field and under small applied fields were performed at different frequencies (i.e., 10--1500^^Hz) and at low temperatures (i.e., 2--10^^K). Multiple magnetization relaxation pathways are observed. Comparison with previously reported {CoIII2DyIII2} complex measurements allows an overall discussion about the origin of the dynamic behavior and its relationship with crystal-field split ground multiplet sublevels.