Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet
Guo, F.-S., Day, B. M., Chen, Y.-C., Tong, M.-L., Mansikkamäki, A., & Layfield, R. A. (2018). Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet. Science, 362(6421), 1400-1403. https://doi.org/10.1126/science.aav0652
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Date
2018Discipline
Epäorgaaninen ja analyyttinen kemiaNanoscience CenterInorganic and Analytical ChemistryNanoscience CenterCopyright
2017 © The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.
Single-molecule magnets (SMMs) containing only one metal center may represent the
lower size limit for molecule-based magnetic information storage materials. Their current
15 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
20 = 80 K for this cation overcomes an essential barrier towards the development of nanomagnet
devices that function at practical temperatures.
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American Association for the Advancement of ScienceISSN Search the Publication Forum
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