Field-induced single-ion magnet behaviour of a hexacoordinated Co(ii) complex with easy-axis-type magnetic anisotropy

Tupolova Yu.; Shcherbakov Igor; Popov Leonid; Lebedev Vladimir; Tkachev  Valerii; Zakharov Konstantin; Vasiliev Alexander; Korchagin Denis; Palii Andrew; Aldoshin Serghei

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TUPOLOVA, Yu., SHCHERBAKOV, Igor, POPOV, Leonid, LEBEDEV, Vladimir, TKACHEV , Valerii, ZAKHAROV, Konstantin, VASILIEV, Alexander, KORCHAGIN, Denis, PALII, Andrew, ALDOSHIN, Serghei. Field-induced single-ion magnet behaviour of a hexacoordinated Co(ii) complex with easy-axis-type magnetic anisotropy. In: Dalton Transactions, 2019, nr. 20(48), pp. 6960-6970. ISSN 1477-9226. DOI: https://doi.org/10.1039/c9dt00770a

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Dalton Transactions

Numărul 20(48) / 2019 / ISSN 1477-9226 /ISSNe 1477-9234

Field-induced single-ion magnet behaviour of a hexacoordinated Co(ii) complex with easy-axis-type magnetic anisotropy

DOI:https://doi.org/10.1039/c9dt00770a

Pag. 6960-6970

Tupolova Yu.¹, Shcherbakov Igor¹, Popov Leonid¹, Lebedev Vladimir¹, Tkachev Valerii², Zakharov Konstantin³, Vasiliev Alexander³⁴⁵, Korchagin Denis², Palii Andrew²⁶, Aldoshin Serghei²

¹ Southern Federal University, Rostov-on-Don,
² Institute of Problems of Chemical Physics, Russian Academy of Sciences,
³ Lomonosov Moscow State University,
⁴ National University of Science and Technology MISiS, Moscow,
⁵ South Ural State University,
⁶ Institute of Applied Physics

Disponibil în IBN: 12 iunie 2019

Rezumat

A coordination compound with the composition [CoLCl ₂ ]·H ₂ O (L = bis-condensation product of diacetyl and 2-hydrazinyl-4,6-dimethylpyrimidine) was synthesized, in which the Co(ii) ion was hexacoordinated. Under applied DC fields, this compound exhibited single-ion magnet behavior. Two relaxation processes were observed when increasing the applied magnetic field from 1000 to 3200 Oe. The first relaxation (high-frequency) was observed both at 1000 Oe and 3200 Oe, while the second relaxation was only registered under a field of 3200 Oe at low frequencies (<1 Hz) and low temperatures (<5 K). Modeling of the magnetic DC properties using the Griffith Hamiltonian accompanied by quantum chemical calculations revealed easy-axis-type magnetic anisotropy with weak rhombic contributions.

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