Magnetic anisotropy in the [CuIILTbIII(hfac) 2]2 single molecule magnet: Experimental study and theoretical modeling

Klokishner Sophia I.; Ostrovsky Sergei M.; Reu Oleg; Palii Andrew; Tregenna-Piggott Philip L.W.; Brock-Nannestad Theis; Bendix Jesper; Mutka Hannu

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KLOKISHNER, Sophia I., OSTROVSKY, Sergei M., REU, Oleg, PALII, Andrew, TREGENNA-PIGGOTT, Philip L.W., BROCK-NANNESTAD, Theis, BENDIX, Jesper, MUTKA, Hannu. Magnetic anisotropy in the [CuIILTbIII(hfac) 2]2 single molecule magnet: Experimental study and theoretical modeling. In: Journal of Physical Chemistry C, 2009, vol. 113, pp. 8573-8582. ISSN 1932-7447. DOI: https://doi.org/10.1021/jp8090842

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Journal of Physical Chemistry C

Volumul 113 / 2009 / ISSN 1932-7447 /ISSNe 1932-7455

Magnetic anisotropy in the [CuIILTbIII(hfac) 2]2 single molecule magnet: Experimental study and theoretical modeling

DOI:https://doi.org/10.1021/jp8090842

Pag. 8573-8582

Klokishner Sophia I.¹, Ostrovsky Sergei M.¹, Reu Oleg¹, Palii Andrew¹, Tregenna-Piggott Philip L.W.², Brock-Nannestad Theis³, Bendix Jesper³, Mutka Hannu⁴

¹ Institute of Applied Physics, Academy of Sciences of Moldova,
² Paul Scherrer Institute,
³ University of Copenhagen,
⁴ Institut Laue-Langevin, Grenoble

Proiecte:

Menționat în lucrare: IB7320-111004 Experimental and Theoretical Study of Exchange and Vibronic Interactions in Compounds Containing Orbitally Degenerate or Quasi- Degenerate Metal Ions: Prospects for Practical Applications

Disponibil în IBN: 28 februarie 2024

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In the present article, we proffer an explanation for the origin of single molecule magnetism in [Cu^IILTb^III(hfac)₂] ₂, a member of the novel class of mixed transition-lanthanide metal clusters. The theoretical model takes into account the crystal field acting on the Tb^III ion as well as the exchange interaction between the Tb ^III and Cu^II ions and provides a good account of the low-lying energy levels, rigorously measured by inelastic neutron scattering and magnetic data. We demonstate that the single molecule magnet (SMM) behavior is not a sole consequence of the low-lying levels of the lanthanide metal ion but a property of the tetranuclear cluster itself. The energy levels are shown to increase with the decrease of the mean value of the Z-projection of the total angular momentum of the cluster, thus forming a barrier for magnetization reversal that is wholly consistent with the observed SMM behavior. On the basis of this study, recommendations are formulated on how the SMM properties for nd-4f clusters may be further improved.

Cuvinte-cheie
Engineering controlled terms Electronic equipment manufacture, ion exchange, Magnetic anisotropy, Magnets, Metal ions, Molecules, Photolithography, rare earth elements, single crystals, Terbium alloys Engineering uncontrolled terms Crystal fields, Energy level, Experimental studies, lanthanide, Low-lying energy levels, Magnetic data, Mean values, Metal cluster, Single Molecule, Single-molecule magnet, Tetranuclear clusters, theoretical modeling, Theoretical models Engineering main heading Magnetization reversal