Slow relaxation of magnetization in a family of linear MnIIIMIIIMnIII (M = Fe, Ru, Os) compounds
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REVENCO, Mihail; SECU, Mihail; OSTROVSKY, Sergei M.; REU, Oleg; PALII, Andrew; PALAMARCIUC, Oleg; PEDERSEN, Kasper; CLERAC, Rodolphe; KLOKISHNER, Sophia. Slow relaxation of magnetization in a family of linear MnIIIMIIIMnIII (M = Fe, Ru, Os) compounds. In: Nanotechnologies and Biomedical Engineering. Editia 3, 23-26 septembrie 2015, Chișinău. Springer, 2015, p. 72.
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Nanotechnologies and Biomedical Engineering
Editia 3, 2015
Conferința "International Conference on Nanotechnologies and Biomedical Engineering"
3rd Edition, Chișinău, Moldova, 23-26 septembrie 2015

Slow relaxation of magnetization in a family of linear MnIIIMIIIMnIII (M = Fe, Ru, Os) compounds


Pag. 72-72

Revenco Mihail1, Secu Mihail1, Ostrovsky Sergei M.2, Reu Oleg2, Palii Andrew2, Palamarciuc Oleg1, Pedersen Kasper3, Clerac Rodolphe3, Klokishner Sophia2
 
1 State University of Moldova,
2 Institute of Applied Physics, Academy of Sciences of Moldova,
3 Centre de Recherche Paul Pascal, CNRS, Universite de Bordeaux
 
Disponibil în IBN: 9 aprilie 2019


Rezumat

The experimental and theoretical study of a family of linear trimeric [NEt4] {[Mn(L)]2[M(CN)6]} (M = Fe, Ru, Os) compounds is reported. All three complexes demonstrate slow relaxation of magnetization at low temperatures. The theoretical model for the explanation of the magnetic behavior (the magnetic susceptibility as a function of temperature and magnetization as a function of the applied magnetic field) includes the spin-orbital interaction acting within the ground 2T1 multiplet of the FeIII, RuIII or OsIII ion, the axial crystal field that splits this multiplet into an orbital singlet and orbital doublet, the zero-field splitting for the MnIII ions, the isotropic exchange interaction in the M-Mn pairs as well as the intercluster interaction taken within the mean field approximation. The proposed model provides a good agreement between the observed and calculated magnetic behavior. The low-lying energy levels form the energy barriers for magnetization reversal for all examined compounds. The calculated heights of these barriers are close to the observed ones.