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

Revenko M.; Secu Mihail; Ostrovsky Sergei M.; Reu Oleg; Palii Andrew; Palamarciuc Oleg; Pedersen Kasper Steen; Clerac Rodolphe; Klokishner Sophia I.

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REVENKO, M., SECU, Mihail, OSTROVSKY, Sergei M., REU, Oleg, PALII, Andrew, PALAMARCIUC, Oleg, PEDERSEN, Kasper Steen, CLERAC, Rodolphe, KLOKISHNER, Sophia I.. Slow relaxation of magnetization in a family of linear MnIIIMIIIMnIII (M = Fe, Ru, Os) compounds. In: Nanotechnologies and Biomedical Engineering, Ed. 3, 23-26 septembrie 2015, Chișinău. Springer, 2015, Editia 3, p. 72.

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Nanotechnologies and Biomedical Engineering
Editia 3, 2015

Conferința "International Conference on Nanotechnologies and Biomedical Engineering"
3, Chișinău, Moldova, 23-26 septembrie 2015

Slow relaxation of magnetization in a family of linear Mn^IIIM^IIIMn^III (M = Fe, Ru, Os) compounds

Pag. 72-72

Revenko M.¹, Secu Mihail¹, Ostrovsky Sergei M.², Reu Oleg², Palii Andrew², Palamarciuc Oleg¹, Pedersen Kasper Steen³, Clerac Rodolphe³, Klokishner Sophia I.²

¹ Moldova State University,
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.

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