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Updated: Mar 17, 2026
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Multiple superhyperfine fields in a {DyFe2Dy} coordination cluster revealed using bulk susceptibility and (57)Fe
Yan Peng1, Valeriu Mereacre2, Christopher E Anson2
1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe, Germany. annie.powell@kit.edu valeriu.mereacre@kit.edu and Institute of Nanotechnology, Karlsruhe Institute of Technology, Postfach 3640, 76021 Karlsruhe, Germany.
This study synthesized a novel dysprosium-iron coordination cluster, revealing antiferromagnetic interactions and quantum tunneling of magnetization. Further investigation using Mössbauer spectroscopy showed complex magnetic field interactions within the cluster.
Area of Science:
- Coordination Chemistry
- Magnetism
- Materials Science
Background:
- Dysprosium-iron (Dy-Fe) coordination clusters are of interest for their unique magnetic properties.
- Understanding quantum tunneling of magnetization (QTM) is crucial for developing advanced magnetic materials.
Purpose of the Study:
- To synthesize and characterize a novel Dy-Fe coordination cluster with the formula [DyFeDy(μ3-OH)2(pmide)2(p-Me-PhCO2)6].
- To investigate the magnetic properties, including antiferromagnetic interactions and QTM.
- To elucidate the underlying magnetic relaxation processes using (57)Fe Mössbauer spectroscopy.
Main Methods:
- Synthesis of the [DyFeDy(μ3-OH)2(pmide)2(p-Me-PhCO2)6] coordination cluster.
- DC and AC magnetic susceptibility measurements.
- (57)Fe Mössbauer spectroscopy.
Main Results:
- The synthesized cluster exhibits dominant antiferromagnetic interactions between Dy and Fe centers.
- AC measurements indicated zero-field quantum tunneling of the magnetization (QTM).
- (57)Fe Mössbauer spectroscopy revealed the presence of multiple superhyperfine fields, indicative of slow magnetization reversal influenced by Dy(III) ions.
Conclusions:
- The study successfully synthesized a novel Dy-Fe coordination cluster with complex magnetic behavior.
- Antiferromagnetic coupling and QTM were observed, highlighting the interplay between Dy and Fe ions.
- Mössbauer spectroscopy provided insights into the dynamic magnetic processes occurring within the cluster.
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