161 Dy Time-Domain Synchrotron Mössbauer Spectroscopy for Investigating Single-Molecule Magnets Incorporating Dy Ions

Lena Scherthan; Sebastian F M Schmidt; Hendrik Auerbach; Tim Hochdörffer; Juliusz A Wolny; Wenli Bi; Jiyong Zhao; Michael Y Hu; Tom Toellner; E Ercan Alp; Dennis E Brown; Christopher E Anson; Annie K Powell; Volker Schünemann

doi:10.1002/anie.201810505

¹⁶¹ Dy Time-Domain Synchrotron Mössbauer Spectroscopy for Investigating Single-Molecule Magnets Incorporating Dy Ions

Angew Chem Int Ed Engl. 2019 Mar 11;58(11):3444-3449. doi: 10.1002/anie.201810505. Epub 2019 Jan 9.

Authors

Affiliations

¹ Department of Physics, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663, Kaiserslautern, Germany.
² Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstr. 15, 76131, Karlsruhe, Germany.
³ Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL, 60439, USA.
⁴ Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
⁵ Department of Physics, Northern Illinois University, 1425 W. Lincoln Hwy., DeKalb, IL, 60115-2828, USA.
⁶ Institute of Nanotechnology, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany.

PMID: 30548520
DOI: 10.1002/anie.201810505

Abstract

Time-domain synchrotron Mössbauer spectroscopy (SMS) based on the Mössbauer effect of ¹⁶¹ Dy has been used to investigate the magnetic properties of a Dy^III -based single-molecule magnet (SMM). The magnetic hyperfine field of [Dy(Cy₃ PO)₂ (H₂ O)₅ ]Br₃ ⋅2 (Cy₃ PO)⋅2 H₂ O⋅2 EtOH is with B₀ =582.3(5) T significantly larger than that of the free-ion Dy^III with a ⁶ H_15/2 ground state. This difference is attributed to the influence of the coordinating ligands on the Fermi contact interaction between the s and 4f electrons of the Dy^III ion. This study demonstrates that ¹⁶¹ Dy SMS is an effective local probe of the influence of the coordinating ligands on the magnetic structure of Dy-containing compounds.

Keywords: Mössbauer spectroscopy; dysprosium; lanthanides; magnetic properties; single-molecule magnets.

Abstract

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