Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet

Guo, Fu-Shen, Day, Benjamin M, Chen, Yan-Cong, Tong, Ming-Liang, Mansikkamäki, Akseli and Layfield, Richard A (2018) Magnetic hysteresis up to 80 kelvin in a dysprosium metallocene single-molecule magnet. Science, 362 (6421). pp. 1400-1403. ISSN 1095-9203

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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 [(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.

Item Type: Article
Additional Information: 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:
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Richard Layfield
Date Deposited: 30 Oct 2018 10:17
Last Modified: 16 Mar 2021 12:36

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