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Single‐Ion Magnetism in a Luminescent Er 3+ β‐Diketonato Complex with Multiple Relaxation Mechanisms
Author(s) -
MartínRamos Pablo,
Ramos Silva Manuela,
Coutinho Joana T.,
Pereira Laura C. J.,
ChamorroPosada Pedro,
MartínGil Jesús
Publication year - 2014
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201301076
Subject(s) - chemistry , relaxation (psychology) , magnetic relaxation , luminescence , ion , magnetism , erbium , crystallography , solid state , magnetic field , doping , condensed matter physics , magnetization , optoelectronics , organic chemistry , psychology , social psychology , physics , quantum mechanics
In the crystal structure of tris(2 , 2,6,6‐tetramethyl‐3,5‐heptanedionato)mono(bathophenanthroline)erbium(III), C 57 H 73 ErN 2 O 6 , the Er 3+ ion is in an antiprismatic environment, surrounded by two N atoms and six O atoms. The β‐diketonato ligands show structural disorder. The ac susceptibility studies conducted at frequencies from 33 to 9995 Hz and at temperatures from 1.7 to 10 K revealed that the application of a static magnetic field induces a slow magnetic relaxation. Two relaxation modes (fast relaxation = FR; slow relaxation = SR) could be distinguished with energy barriers U FR / k B = 15.6 K and U SR / k B = 22.4 K and relaxation times of 10 –6 and 10 –4 s, respectively. The Er 3+ compound is luminescent in the solid state, emitting in the near IR region.