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Coexistence of Distinct Single-Ion and Exchange-Based Mechanisms for Blocking of Magnetization in a CoII2DyIII2 Single-Molecule Magnet

Authors

  • Dr. Kartik Chandra Mondal,

    1. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany)
    2. Institute of Nanotechnology, Karlsruhe Institute of Technology, 76204 Karlsruhe (Germany)
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  • Alexander Sundt,

    1. Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg (Germany)
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  • Dr. Yanhua Lan,

    1. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany)
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  • Dr. George E. Kostakis,

    1. Institute of Nanotechnology, Karlsruhe Institute of Technology, 76204 Karlsruhe (Germany)
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  • Prof. Oliver Waldmann,

    Corresponding author
    1. Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg (Germany)
    • Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg (Germany)
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  • Dr. Liviu Ungur,

    1. Division of Quantum and Physical Chemistry and INPAC—Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
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  • Prof. Dr. Liviu F. Chibotaru,

    Corresponding author
    1. Division of Quantum and Physical Chemistry and INPAC—Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
    • Division of Quantum and Physical Chemistry and INPAC—Institute of Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Heverlee (Belgium)
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  • Dr. Christopher E. Anson,

    1. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany)
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  • Prof. Dr. Annie K. Powell

    Corresponding author
    1. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany)
    2. Institute of Nanotechnology, Karlsruhe Institute of Technology, 76204 Karlsruhe (Germany)
    • Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe (Germany)
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  • Financial support by INPAC and Methusalem grants of the University of Leuven (L.U.), DFG-CFN (Y.L.), and DFG-TR-SFB-3MET (A.K.P.). We thank F. Axtmann for help in experiments. L.U. is a post-doc of the FWO-Vlaanderen (Flemisch Science Foundation).

Abstract

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Relaxen auf zweierlei Weisen: Ein Einzelmolekülmagnet mit einem defekten Co2Dy2-Dicuban als Kern zeigt langsame Relaxation der Magnetisierung bei einer Blocking-Temperatur von 22 K (bei 1500 Hz), die für einen 3d-4f-Einzelmolekülmagneten die höchste berichtete ist. Eine Analyse der Relaxation ergibt zwei Bereiche an Blocking-Temperaturen, von denen einer intraionisch an den DyIII-Ionen lokalisiert und der andere austauschbasiert ist.

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