Relaxation Dynamics and Magnetic Anisotropy in a Low‐Symmetry DyIII Complex |
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| Authors: | Eva Lucaccini Matteo Briganti Dr Mauro Perfetti Dr Laure Vendier Dr Jean‐Pierre Costes Dr Federico Totti Prof?Dr Roberta Sessoli Prof?Dr Lorenzo Sorace |
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| Affiliation: | 1. Dipartimento di Chimica “U.Schiff” and UdR INSTM, Università degli Studi di Firenze, Sesto Fiorentino, Italy;2. Instituto de Química, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil;3. Institut für Physikalische Chemie, Universit?t Stuttgart, Stuttgart, Germany;4. Laboratoire de Chimie de Coordination, CNRS, Toulouse, France |
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| Abstract: | The magnetic behaviour of a Dy(LH)3 complex (LH? is the anion of 2‐hydroxy‐N′‐(E)‐(2‐hydroxy‐3‐methoxyphenyl)methylidene]benzhydrazide) was analysed in depth from both theoretical and experimental points of view. Cantilever torque magnetometry indicated that the complex has Ising‐type anisotropy, and provided two possible directions for the easy axis of anisotropy due to the presence of two magnetically non‐equivalent molecules in the crystal. Ab initio calculations confirmed the strong Ising‐type anisotropy and disentangled the two possible orientations. The computed results obtained by using ab initio calculations were then used to rationalise the composite dynamic behaviour observed for both pure DyIII phase and YIII diluted phase, which showed two different relaxation channels in zero and non‐zero static magnetic fields. In particular, we showed that the relaxation behaviour at the higher temperature range can be correctly reproduced by using a master matrix approach, which suggests that Orbach relaxation is occurring through a second excited doublet. |
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| Keywords: | ab initio calculations cantilever torque magnetometry lanthanides magnetisation relaxation single-molecule magnets |
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