Artículos de revistas
Exploring the Slow Relaxation of the Magnetization in CoIII-Decorated {DyIII 2} Units
Fecha
2016-07Registro en:
Funes, Víctor Alejandro; Carrella, Luca; Rentschler, Eva; Alborés, Pablo; Exploring the Slow Relaxation of the Magnetization in CoIII-Decorated {DyIII 2} Units; Wiley VCH Verlag; Chemistry- A European Journal; 22; 40; 7-2016; 14308-14318
0947-6539
CONICET Digital
CONICET
Autor
Funes, Víctor Alejandro
Carrella, Luca
Rentschler, Eva
Alborés, Pablo
Resumen
We have prepared and structurally characterized a new member of the butterfly-like {CoIII 2DyIII 2} single-molecule magnets (SMMs) through further CoIIIdecoration, with the formula [CoIII 4DyIII 2(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 {CoIII 2DyIII 2} complex measurements allows an overall discussion about the origin of the dynamic behavior and its relationship with crystal-field split ground multiplet sublevels.