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, Veaceslav
Ungur, Liviu
Jia, Jian-Hua
Chibotaru, Liviu ×
Lan, Yanhua
Wernsdorfer, Wolfgang
Gao, Song
Chen, Xiao-Ming
Tong, Ming-Liang #
Issue Date: 7-Apr-2016
Publisher: American Chemical Society
Series Title: Journal of the American Chemical Society vol:138 pages:5441-5450
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.
ISSN: 0002-7863
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Quantum Chemistry and Physical Chemistry Section
× corresponding author
# (joint) last author

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