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Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet
journal contribution
posted on 2023-06-09, 15:39 authored by Fu-Shen Guo, Benjamin M Day, Yan-Cong Chen, Ming-Liang Tong, Akseli Mansikkamäki, Richard LayfieldRichard LayfieldSingle-molecule magnets (SMMs) containing only one metal center may represent the lower size limit for molecule-based magnetic information storage materials. Their current drawback is that all SMMs require liquid-helium cooling to show magnetic memory effects. We now report a chemical strategy to access the dysprosium metallocene cation [(CpiPr5)Dy(Cp*)]+ (CpiPr5 = penta-iso-propylcyclopentadienyl, Cp* = pentamethylcyclopentadienyl), which displays magnetic hysteresis above liquid-nitrogen temperatures. An effective energy barrier to reversal of the magnetization of Ueff = 1,541 cm–1 is also measured. The magnetic blocking temperature of TB = 80 K for this cation overcomes an essential barrier towards the development of nanomagnet devices that function at practical temperatures.
History
Publication status
- Published
File Version
- Accepted version
Journal
ScienceISSN
1095-9203Publisher
American Association for the Advancement of ScienceExternal DOI
Issue
6421Volume
362Page range
1400-1403Department affiliated with
- Chemistry Publications
Notes
This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on 21 DEC 2018, vol. 362: 1400-1403, DOI: https://doi.org/10.1126/science.aav0652Full text available
- Yes
Peer reviewed?
- Yes