Journal Article10.1021/JACS.6B02638
A Stable Pentagonal Bipyramidal Dy(III) Single-Ion Magnet with a Record Magnetization Reversal Barrier over 1000 K.
Jiang Liu,Yan-Cong Chen,Jun-Liang Liu,Veacheslav Vieru,Liviu Ungur,Liviu Ungur,Jian-Hua Jia,Liviu F. Chibotaru,Yanhua Lan,Wolfgang Wernsdorfer,Song Gao,Xiao-Ming Chen,Ming-Liang Tong +12 more
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TL;DR: Two highly stable and neutral Dy(III) classical coordination compounds with pentagonal bipyramidal local geometry that exhibit SMM behavior are reported.
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Abstract: Single-molecule magnets (SMMs) with a large spin reversal barrier have been recognized to exhibit slow magnetic relaxation that can lead to a magnetic hysteresis loop. Synthesis of highly stable SMMs with both large energy barriers and significantly slow relaxation times is challenging. Here, we report two highly stable and neutral Dy(III) classical coordination compounds with pentagonal bipyramidal local geometry that exhibit SMM behavior. Weak intermolecular interactions in the undiluted single crystals are first observed for mononuclear lanthanide SMMs by micro-SQUID measurements. The investigation of magnetic relaxation reveals the thermally activated quantum tunneling of magnetization through the third excited Kramers doublet, owing to the increased axial magnetic anisotropy and weaker transverse magnetic anisotropy. As a result, pronounced magnetic hysteresis loops up to 14 K are observed, and the effective energy barrier (Ueff = 1025 K) for relaxation of magnetization reached a breakthrough among the SMMs.
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Citations
Study of the influence of magnetic dilution over relaxation processes in a Zn/Dy single-ion magnet by correlation between luminescence and magnetism
Jérôme Long,Ekaterina Mamontova,Vania T. Freitas,Dominique Luneau,Veacheslav Vieru,Liviu F. Chibotaru,Rute A. S. Ferreira,Gautier Félix,Yannick Guari,Luís D. Carlos,Joulia Larionova +10 more
TL;DR: In this paper, the authors investigated the magnetic dilution effect on the relaxation mechanisms and the estimation of the energy barrier in a photo-luminescent Dy(III)/Y(III) based Single-Ion Magnet (SIM).
Azide-Coordination in Homometallic Dinuclear Lanthanide(III) Complexes Containing Nonequivalent Lanthanide Metal Ions: Zero-Field SMM Behavior in the Dysprosium Analogue.
Pawan Kumar,Sourav Biswas,Abinash Swain,Joydev Acharya,Vierandra Kumar,Pankaj Kalita,Jessica Flores Gonzalez,Olivier Cador,Fabrice Pointillart,Gopalan Rajaraman,Vadapalli Chandrasekhar,Vadapalli Chandrasekhar +11 more
TL;DR: A series of homometallic dinuclear lanthanide complexes containing nonequivalent metal centers [Ln(2)(LH(2))(LH)(CH(3)OH)(N(3))] was synthesized and characterized as mentioned in this paper.
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Mechanochromic and Single-Molecule Magnetic Properties of a Rhodamine 6G Dy(III) Complex
Mei-Jiao Liu,Zhiyuan Fu,Rong Sun,Juan Yuan,Cai-Ming Liu,Bo Zou,Bing-Wu Wang,Hui-Zhong Kou +7 more
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Influence of the Different Types of Auxiliary Noncarboxylate Organic Ligands on the Topologies and Magnetic Relaxation Behavior of Zn-Dy Heterometallic Single Molecule Magnets.
TL;DR: In this article, a Zn-Dy complex was synthesized by employing H2L, anhydrous ZnCl2, and Dy(NO3)3·5H2O reacting with auxiliary ligand teaH3 in the mixture of CH3OH and DMF.
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Design of a Family of Ln3 Triangles with the HAT Ligand (1,4,5,8,9,12-Hexaazatriphenylene): Single-Molecule Magnetism
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