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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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 = 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
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: 11 Jul 2019 15:46
URI: http://sro.sussex.ac.uk/id/eprint/79794

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