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Guo, Fu-Sheng; Day, Benjamin M; Chen, Yan-Cong; Tong, Ming-Liang; Mansikkamäki, Akseli; Layfield, Richard A
Science, 2018-Dec-21, 2018-12-21, 20181221, Letnik: 362, Številka: 6421Journal Article
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 )Dy(Cp*) (Cp , penta-iso-propylcyclopentadienyl; Cp pentamethylcyclopentadienyl), which displays magnetic hysteresis above liquid-nitrogen temperatures. An effective energy barrier to reversal of the magnetization of = 1541 wave number is also measured. The magnetic blocking temperature of = 80 kelvin for this cation overcomes an essential barrier toward the development of nanomagnet devices that function at practical temperatures.
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in: SICRIS
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