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

Rapid Communication

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

Rasmus Westerström, Jan Dreiser, Cinthia Piamonteze, Matthias Muntwiler, Stephen Weyeneth, Karl Krämer, Shi-Xia Liu, Silvio Decurtins, Alexey Popov, Shangfeng Yang, Lothar Dunsch, and Thomas Greber

Phys. Rev. B 89, 060406(R) – Published 27 February 2014

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 ${Dy}_{n} {Sc}_{3 - n} N@ C_{80}$ ( $n = 1, 2, 3$ ). All three exhibit distinct hysteresis and qualify as single-molecule 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 ${Dy}_{2} ScN@ C_{80}$ 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.

Received 18 October 2013

DOI:https://doi.org/10.1103/PhysRevB.89.060406

Authors & Affiliations

Rasmus Westerström^1,2,3, Jan Dreiser², Cinthia Piamonteze², Matthias Muntwiler², Stephen Weyeneth¹, Karl Krämer⁴, Shi-Xia Liu⁴, Silvio Decurtins⁴, Alexey Popov⁵, Shangfeng Yang^5,6, Lothar Dunsch⁵, and Thomas Greber^1,*

¹Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
²Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
³Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
⁴Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
⁵Department of Electrochemistry and Conducting Polymers, Leibniz Institute of Solid State and Materials Research, Dresden, D-01069 Dresden, Germany
⁶Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China

^*greber@physik.uzh.ch

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 89, Iss. 6 — 1 February 2014

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review B

covering condensed matter and materials physics