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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 |
Appears in Collections: | Staff Publications Elements |
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Liu_JACS_2016.pdf | Published version | 670.37 kB | Adobe PDF | CLOSED | None | |
Liu_JACS_2016.cif.txt | Supporting information | 63.95 kB | Text | CLOSED | None | |
Liu_JACS_2016_SI.pdf | Supporting information | 3.25 MB | Adobe PDF | CLOSED | None |
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