X-ray induced demagnetization of single-molecule magnets

Journal Article · Mon Jul 21 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4891485· OSTI ID:22311151

Dreiser, Jan ^[1]; Westerström, Rasmus ^[1]; Piamonteze, Cinthia; Nolting, Frithjof ^[1]; Rusponi, Stefano; Brune, Harald ^[2]; Yang, Shangfeng ^[3]; Popov, Alexey; Dunsch, Lothar ^[4]; Greber, Thomas ^[5]

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1. Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI (Switzerland)
2. Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland)
3. Hefei 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)
4. Department of Electrochemistry and Conducting Polymers, Leibniz Institute of Solid State and Materials Research, 01069 Dresden (Germany)
5. Physik-Institut, Universität Zürich, 8057 Zürich (Switzerland)

Low-temperature x-ray magnetic circular dichroism measurements on the endohedral single-molecule magnet DySc{sub 2}N@C{sub 80} at the Dy M{sub 4,5} edges reveal a shrinking of the opening of the observed hysteresis with increasing x-ray flux. Time-dependent measurements show that the exposure of the molecules to x-rays resonant with the Dy M{sub 5} edge accelerates the relaxation of magnetization more than off-resonant x-rays. The results cannot be explained by a homogeneous temperature rise due to x-ray absorption. Moreover, the observed large demagnetization cross sections indicate that the resonant absorption of one x-ray photon induces the demagnetization of many molecules.

• OSTI ID: 22311151
• Journal Information: Applied Physics Letters, Vol. 105, Issue 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
CARBON
CROSS SECTIONS
DEMAGNETIZATION
DYSPROSIUM COMPOUNDS
MAGNETIC CIRCULAR DICHROISM
MAGNETIZATION
MAGNETS
MOLECULES
NITROGEN COMPOUNDS
PHOTONS
RELAXATION
RESONANCE
SCANDIUM COMPOUNDS
TIME DEPENDENCE
X RADIATION