Journal
SCIENCE
Volume 362, Issue 6421, Pages 1400-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aav0652
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Funding
- European Research Council (CoG grant) [646740]
- EPSRC [EP/M022064/1]
- NSF China [21620102002, 91422302]
- National Key Research and Development Program of China [2018YFA0306001]
- Academy of Finland [282499, 289172]
- EPSRC [EP/M022064/2, EP/M022064/1] Funding Source: UKRI
- European Research Council (ERC) [646740] Funding Source: European Research Council (ERC)
- Academy of Finland (AKA) [282499] Funding Source: Academy of Finland (AKA)
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Single-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 [(Cp-iPr5)Dy(Cp*)](+) (Cp-iPr5, penta-iso-propylcyclopentadienyl; Cp*, pentamethylcyclopentadienyl), which displays magnetic hysteresis above liquid-nitrogen temperatures. An effective energy barrier to reversal of the magnetization of U-eff = 1541 wave number is also measured. The magnetic blocking temperature of T-B = 80 kelvin for this cation overcomes an essential barrier toward the development of nanomagnet devices that function at practical temperatures.
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