Details

Autor(en) / Beteiligte

• Guo, Fu-Sheng
• Day, Benjamin M
• Chen, Yan-Cong
• Tong, Ming-Liang
• Mansikkamäki, Akseli
• Layfield, Richard A

Titel

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

Ist Teil von

• Science (American Association for the Advancement of Science), 2018-12, Vol.362 (6421), p.1400-1403

Ort / Verlag

United States: The American Association for the Advancement of Science

Erscheinungsjahr

2018

Link zum Volltext

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• 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.