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Tunneling, remanence, and frustration in dysprosium-based endohedral single-molecule magnets

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Westerström Rasmus, Dreiser Jan, Piamonteze Cinthia, Muntwiler Matthias, Weyeneth Stephen, Krämer Karl, Liu Shi-Xia, Decurtins Silvio, Popov Alexey, Yang Shangfeng, Dunsch Lothar, Greber Thomas,
Project Dimensional and Anisotropy Control of Model Quantum Magnets
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Original article (peer-reviewed)

Journal Physical Review B
Volume (Issue) 89(6)
Page(s) 060406(R) - 4
Title of proceedings Physical Review B
DOI 10.1103/physrevb.89.060406

Open Access

URL http://boris.unibe.ch/id/eprint/59690
Type of Open Access Repository (Green Open Access)

Abstract

Paramagnetic atoms inside nanometer sized fullerenes realize robust, and chemically protected, spin systems. Changing the stoichiometry of the endohedral clusters results in a variety of magnetic ground states, as it is demonstrated for DynSc3−nN@C80 (n = 1,2,3). All three exhibit distinct hysteresis and qualify as singlemolecule magnets. In zero field the magnetization of n = 1 decays via quantum tunneling, while ferromagnetic coupling of the individual dysprosium moments results in remanence for Dy2ScN@C80 and in a frustrated ground state for n = 3. The latter ground state turns out to be one of the simplest realizations of a frustrated, ferromagnetically coupled, system.
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