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Enhancement of Spin Relaxation in an FeDy2Fe Coordination Cluster by Magnetic Fields |
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| Authors: | Dr Guo Peng Dr Valeriu Mereacre Dr George E Kostakis Dr Juliusz A Wolny ProfDr Volker Schünemann Prof Dr Annie K Powell |
| Institution: | 1. Institute of Nanotechnology, Karlsruhe Institute of Technology, Postfach 3640, 76021 Karlsruhe (Germany);2. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76128 Karlsruhe (Germany);3. Institute of Physics, University of Kaiserslautern, Erwin Schr?dingerstrasse 56, 67653 Kaiserslautern (Germany) |
| Abstract: | Two FeLn2Fe(μ3‐OH)2(teg)2(N3)2(C6H5COO)4] compounds (where Ln=YIII and DyIII; 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 57Fe 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 DyIII ions. |
| Keywords: | cooperative effects heterometallic complexes iron lanthanides Moessbauer spectroscopy |