An Endohedral Single-Molecule Magnet with Long Relaxation Times: DySc2N@C80

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• 作者：Rasmus Westerstr枚m ; Jan Dreiser ; Cinthia Piamonteze ; Matthias Muntwiler ; Stephen Weyeneth ; Harald Brune ; Stefano Rusponi ; Frithjof Nolting ; Alexey Popov ; Shangfeng Yang ; Lothar Dunsch ; Thomas Greber
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：June 20, 2012
• 年：2012
• 卷：134
• 期：24
• 页码：9840-9843
• 全文大小：297K
• 年卷期：v.134,no.24(June 20, 2012)
• ISSN：1520-5126

文摘

The magnetism of DySc₂N@C₈₀ endofullerene was studied with X-ray magnetic circular dichroism (XMCD) and a magnetometer with a superconducting quantum interference device (SQUID) down to temperatures of 2 K and in fields up to 7 T. XMCD shows hysteresis of the 4f spin and orbital moment in Dy^III ions. SQUID magnetometry indicates hysteresis below 6 K, while thermal and nonthermal relaxation is observed. Dilution of DySc₂N@C₈₀ samples with C₆₀ increases the zero-field 4f electron relaxation time at 2 K to several hours.