Please use this identifier to cite or link to this item: https://doi.org/10.1021/jacs.6b02638
Title: A Stable Pentagonal Bipyramidal Dy(III) Single-Ion Magnet with a Record Magnetization Reversal Barrier over 1000 K
Authors: Liu, Jiang
Chen, Yan-Cong
Liu, Jun-Liang
Vieru, Veacheslav
Ungur, Liviu 
Jia, Jian-Hua
Chibotaru, Liviu F
Lan, Yanhua
Wernsdorfer, Wolfgang
Gao, Song
Chen, Xiao-Ming
Tong, Ming-Liang
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
SPIN-LATTICE-RELAXATION
MOLECULE MAGNETS
LANTHANIDE COMPLEXES
ANISOTROPY BARRIER
SYMMETRY
BLOCKING
EXCHANGE
BEHAVIOR
Issue Date: 27-Apr-2016
Publisher: AMER CHEMICAL SOC
Citation: Liu, Jiang, Chen, Yan-Cong, Liu, Jun-Liang, Vieru, Veacheslav, Ungur, Liviu, Jia, Jian-Hua, Chibotaru, Liviu F, Lan, Yanhua, Wernsdorfer, Wolfgang, Gao, Song, Chen, Xiao-Ming, Tong, Ming-Liang (2016-04-27). A Stable Pentagonal Bipyramidal Dy(III) Single-Ion Magnet with a Record Magnetization Reversal Barrier over 1000 K. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138 (16) : 5441-5450. ScholarBank@NUS Repository. https://doi.org/10.1021/jacs.6b02638
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.
Source Title: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
URI: https://scholarbank.nus.edu.sg/handle/10635/228793
ISSN: 0002-7863
1520-5126
DOI: 10.1021/jacs.6b02638
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