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Symmetry-Supported Magnetic Blocking at 20 K in Pentagonal Bipyramidal Dy(III) Single-Ion Magnets

Yan Cong Chen;Jun Liang Liu;Liviu Ungur;Jiang Liu;Quan Wen Li;Long Fei Wang;Zhao Ping Ni;Liviu F. Chibotaru;小明 陈;明良 童

Sun Yat-Sen University;KU Leuven;Lund University

发表时间:2016-3-2

期 刊:Journal of the American Chemical Society

语 言:English

U R L: http://www.scopus.com/inward/record.url?scp=84959467364&partnerID=8YFLogxK

摘要

Single-molecule magnets (SMMs) that can be trapped in one of the bistable magnetic states separated by an energy barrier are among the most promising candidates for high-density information storage, quantum processing, and spintronics. To date, a considerable series of achievements have been made. However, the presence of fast quantum tunnelling of magnetization (QTM) in most SMMs, especially in single-ion magnets (SIMs), provides a rapid relaxation route and often sets up a limit for the relaxation time. Here, we pursue the pentagonal bipyramidal symmetry to suppress the QTM and present pentagonal bipyramidal Dy(III) SIMs [Dy(Cy3PO)2(H2O)5]Cl3·(Cy3PO)·H2O·EtOH (1) and [Dy(Cy3PO)2(H2O)5]Br3·2(Cy3PO)·2H2O·2EtOH (2), (Cy3PO = tricyclohexyl phosphine oxide). Magnetic characterizations reveal their fascinating SMM properties with high energy barriers as 472(7) K for 1 and 543(2) K for 2, along with a record magnetic hysteresis temperature up to 20 K for 2. These results, combined with the ab initio calculations, offer an illuminating insight into the vast possibility and potential of what the symmetry rules can achieve in molecular magnetism.

相关科学

生物化学、遗传学和分子生物学
生物化学
化学工程
催化
胶体与表面化学
化学

被引量

期刊度量

Scopus度量

年份 CiteScore SJR SNIP
1996
1997
1998
1999 3.438 2.106
2000 3.589 2.141
2001 3.506 2.112
2002 3.587 2.324
2003 3.421 2.223
2004 3.841 2.187
2005 4.413 2.205
2006 4.662 2.229
2007 5.202 2.134
2008 5.06 2.121
2009 4.958 2.199
2010 5.167 2.14
2011 16.1 5.478 2.326
2012 17.4 6.211 2.373
2013 19.3 5.993 2.446
2014 20.9 6.294 2.568
2015 22.4 6.775 2.602
2016 23.5 7.492 2.608
2017 24 8.127 2.634
2018 24.4 7.468 2.652
2019 24.8 6.976 2.682
2020 25
2021

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