A mononuclear Fe(III) complex showing thermally induced spin crossover and slow magnetic relaxation with reciprocating thermal behaviour

Terézia Bridová; Cyril Rajnák; Ján Titiš; Erika Samoľová; Kevin Tran; Ondřéj Malina; Alina Bieńko; Franz Renz; Milan Gembický; Roman Boča

doi:10.1039/D4DT00642A

A mononuclear Fe(iii) complex showing thermally induced spin crossover and slow magnetic relaxation with reciprocating thermal behaviour†

Terézia Bridová,^a Cyril Rajnák,

*^a Ján Titiš,

^a Erika Samoľová,

^b Kevin Tran,

^c Ondřéj Malina,

^de Alina Bieńko,

^f Franz Renz,

^c Milan Gembický

^g and Roman Boča

*^h

Author affiliations

* Corresponding authors

^a Faculty of Natural Sciences, University of Ss. Cyril and Methodius, 917 01 Trnava, Slovakia
E-mail: cyril.rajnak@ucm.sk

^b Institute of Physics of the Czech Academy of Sciences, 182 21 Prague, Czech Republic

^c Institute of Inorganic Chemistry, Leibniz University, Hannover, Germany

^d Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University Olomouc, Olomouc, Czech Republic

^e Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB–Technical University of Ostrava, Ostrava-Poruba, Czech Republic

^f Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, 50-383 Wroclaw, Poland

^g X-ray Crystallography Facility, UC San Diego, 5128 Urey Hall MC 0358, 9500 Gilman Drive, La Jolla, CA 92093, USA

^h Faculty of Health Sciences, University of Ss. Cyril and Methodius, 917 01 Trnava, Slovakia
E-mail: roman.boca@ucm.sk

Abstract

AC susceptibility measurements of [Fe^III(L⁵)(NCSe)] reveal a field supported slow magnetic relaxation. On cooling, the relaxation time of the high-frequency fraction decreases which is a sign of reciprocating thermal behaviour. The relaxation time for the low-frequency mode at T = 2.0 K is as high as τ(LF) = 2.0 s.

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A mononuclear Fe(iii) complex showing thermally induced spin crossover and slow magnetic relaxation with reciprocating thermal behaviour†

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A mononuclear Fe(III) complex showing thermally induced spin crossover and slow magnetic relaxation with reciprocating thermal behaviour

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