Experimental characterization and theoretical modeling of a linear [Co II2TbIII] single molecule magnet

Reu Oleg; Palii Andrew; Ostrovsky Sergei M.; Wallace Warren A.; Zaharko Oksana; Chandrasekhar Vadapalli; Clerac Rodolphe; Klokishner Sophia I.

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REU, Oleg, PALII, Andrew, OSTROVSKY, Sergei M., WALLACE, Warren A., ZAHARKO, Oksana, CHANDRASEKHAR, Vadapalli, CLERAC, Rodolphe, KLOKISHNER, Sophia I.. Experimental characterization and theoretical modeling of a linear [Co II2TbIII] single molecule magnet. In: Journal of Physical Chemistry C, 2013, vol. 117, pp. 6880-6888. ISSN 1932-7447. DOI: https://doi.org/10.1021/jp401305g

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Journal of Physical Chemistry C

Volumul 117 / 2013 / ISSN 1932-7447 /ISSNe 1932-7455

Experimental characterization and theoretical modeling of a linear [Co II2TbIII] single molecule magnet

DOI:https://doi.org/10.1021/jp401305g

Pag. 6880-6888

Reu Oleg¹, Palii Andrew¹, Ostrovsky Sergei M.¹, Wallace Warren A.²³, Zaharko Oksana², Chandrasekhar Vadapalli⁴⁵, Clerac Rodolphe⁶⁷, Klokishner Sophia I.¹

¹ Institute of Applied Physics, Academy of Sciences of Moldova,
² Paul Scherrer Institute,
³ Department of Chemistry and Biochemistry, University of Bern,
⁴ Indian Institute of Technology Kanpur,
⁵ Tata Institute of Fundamental Research Hyderabad / Narsingi,
⁶ CNRS, CRPP, UPR 8641,
⁷ Universite de Bordeaux, CRPP, UPR 8641

Proiecte:

Menționat în lucrare: 11.817.05.03A Materiale semiconductoare halcogenice, compuşi metaloorganici şi magneţi moleculari pentru medii de înregistrare, senzori, aplicaţii optoelectronice şi fotovoltaice

Disponibil în IBN: 28 februarie 2024

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Rezumat

In this report, we present combined experimental and theoretical studies of the trinuclear {[L₂Co₂Tb][NO₃]} (LH ₃ = (S)P[N(Me)Nî -CH -C₆H₃-2-OH-3-OMe] ₃) complex exhibiting single molecule magnet properties. Our theoretical model includes the axial crystal fields acting on the Tb ^III and Co^II ions, the spin-orbit interaction operating within the ⁴T₁ ground term of the Co^II ion, and the ferromagnetic exchange between Tb and Co magnetic centers. We demonstrate for the [L₂Co₂Tb]⁺ complex that the strong negative single-ion anisotropy of both Tb^III and Co^II ions is the reason for the observed slow relaxation of magnetization. The elaborated model describes perfectly the experimental magnetic properties of the complex as a function of temperature and the external magnetic field.

Cuvinte-cheie
Engineering controlled terms Carbon dioxide, ion exchange, Ions, Magnets, Molecules, Single crystals Engineering uncontrolled terms Experimental characterization, external magnetic field, Ferromagnetic exchange, Single ion anisotropy, Single-molecule magnet, Spin orbit interactions, theoretical modeling, Theoretical models Engineering main heading Cobalt compounds