1. Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet.
- Author
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Guo, Fu-Sheng, Day, Benjamin M., Chen, Yan-Cong, Tong, Ming-Liang, Mansikkamäki, Akseli, and Layfield, Richard A.
- Subjects
- *
SINGLE molecule magnets , *HYSTERESIS loop , *METALLOCENES , *NANOMAGNETICS , *ACTIVATION energy - Abstract
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 [(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 = 1541 wave number is also measured. The magnetic blocking temperature of TB = 80 kelvin for this cation overcomes an essential barrier toward the development of nanomagnet devices that function at practical temperatures. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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