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Surface Aligned Magnetic Moments and Hysteresis of an Endohedral Single-Molecule Magnet on a Metal
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 114, no 8, 087201Article in journal (Refereed) Published
Abstract [en]

The interaction between the endohedral unit in the single-molecule magnet Dy2ScN@C-80 and a rhodium (111) substrate leads to alignment of the Dy 4f orbitals. The resulting orientation of the Dy2ScN plane parallel to the surface is inferred from comparison of the angular anisotropy of x-ray absorption spectra and multiplet calculations in the corresponding ligand field. The x-ray magnetic circular dichroism is also angle dependent and signals strong magnetocrystalline anisotropy. This directly relates geometric and magnetic structure. Element specific magnetization curves from different coverages exhibit hysteresis at a sample temperature of similar to 4 K. From the measured hysteresis curves, we estimate the zero field remanence lifetime during x-ray exposure of a submonolayer to be about 30 seconds.

Place, publisher, year, edition, pages
2015. Vol. 114, no 8, 087201
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Physical Sciences
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URN: urn:nbn:se:uu:diva-252249DOI: 10.1103/PhysRevLett.114.087201ISI: 000352072100008PubMedID: 25768775OAI: oai:DiVA.org:uu-252249DiVA: diva2:809851
Available from: 2015-05-05 Created: 2015-05-04 Last updated: 2017-12-04Bibliographically approved

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Westerström, RasmusMuntwiler, Matthias

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