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Enhancement of Spin Relaxation in an FeDy 2 Fe Coordination Cluster by Magnetic Fields
Author(s) -
Peng Guo,
Mereacre Valeriu,
Kostakis George E.,
Wolny Juliusz A.,
Schünemann Volker,
Powell Annie K.
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403792
Subject(s) - cluster (spacecraft) , relaxation (psychology) , coordination complex , spin (aerodynamics) , materials science , condensed matter physics , magnetic relaxation , magnetic field , chemical physics , nuclear magnetic resonance , magnetization , chemistry , physics , metal , computer science , metallurgy , psychology , thermodynamics , quantum mechanics , social psychology , programming language
Two [FeLn 2 Fe(μ 3 ‐OH) 2 (teg) 2 (N 3 ) 2 (C 6 H 5 COO) 4 ] compounds (where Ln=Y III and Dy III ; teg=triethylene glycol anion) have been synthesized and studied using SQUID and Mössbauer spectroscopy. The magnetic measurements on both compounds indicate dominant antiferromagnetic interactions between the metal centers. Analysis of the 57 Fe Mössbauer spectra complement the ac magnetic susceptibility measurements, which show how a static magnetic field can quench the slow relaxation of magnetization generated by the anisotropic Dy III ions.