abstract
We investigate the magnetic dilution effect on the relaxation mechanisms and the estimation of the energy barrier in a photo-luminescent Dy(III)/Y(III) based Single-Ion Magnet (SIM). The photo-luminescent spectroscopy permits the careful determination of the Orbach barrier, which is in a good agreement with the ab initio calculations. This barrier does not change upon magnetic dilution. The magnetic properties investigations highlight that the determination of the energy barrier is affected by magnetic dilution due to the changes in Quantum Tunnelling of the Magnetization (QTM).
keywords
MONONUCLEAR DYSPROSIUM COMPLEX; SPIN-LATTICE-RELAXATION; 2ND EXCITED-STATE; MOLECULE MAGNETS; SMM BEHAVIOR; URANIUM(III) COMPLEXES; LANTHANIDE COMPLEXES; SLOW RELAXATION; ENERGY-TRANSFER; ANISOTROPY
subject category
Chemistry
authors
Long, J; Mamontova, E; Freitas, V; Luneau, D; Vieru, V; Chibotaru, LF; Ferreira, RAS; Felix, G; Guari, Y; Carlos, LD; Larionova, J
our authors
Luís Carlos
Full professor
Maria Rute de Amorim e Sá Ferreira André
Full professor
Vânia Patrícia Castro Teixeira Freitas
Research Fellowshipacknowledgements
The authors thank the University of Montpellier, CNRS and PAC Balard ICGM. E. M. acknowledges the financial support from the LABEX CheMISyst ANR-10-LABX-05-01. This work is partially developed in the scope of the projects CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013) financed by national funds through the Fundacao para a Ciencia e a Tecnologia/Ministerio da Educacao e Ciencia (FCT/MEC) and when applicable co-financed by FEDER under the PT2020 Partnership Agreement. The Portugal-France bilateral action, Programa PESSOA (Hubert Curien)