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American Chemical Society, Journal of the American Chemical Society, 24(134), p. 9840-9843, 2012

DOI: 10.1021/ja301044p

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An endohedral single-molecule magnet with long relaxation times: DySc2N@C80

Journal article published in 2012 by Rasmus Westerström, Jan Dreiser, Stephen Weyeneth, Matthias Muntwiler ORCID, Cinthia Piamonteze ORCID, Harald Brune, Stefano Rusponi, Frithjof Nolting, Shangfeng Yang, Alexey Popov, Lothar Dunsch, Thomas Greber
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The magnetism of DySc(2)N@C(80) 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 DySc(2)N@C(80) samples with C(60) increases the zero-field 4f electron relaxation time at 2 K to several hours.