Related Experiment Video
Updated: Jul 15, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
A binuclear Fe(III)Dy(III) single molecule magnet. Quantum effects and models
Marilena Ferbinteanu1, Takashi Kajiwara, Kwang-Yong Choi
1Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
This study characterizes a binuclear iron-lanthanide complex with Single Molecule Magnet (SMM) properties. Experimental and theoretical analyses reveal magnetic ordering and quantum tunneling effects crucial for SMM behavior.
Area of Science:
- Coordination Chemistry
- Magnetochemistry
- Computational Chemistry
Background:
- Exploration of lanthanide-transition metal complexes for advanced magnetic materials.
- Understanding Single Molecule Magnet (SMM) behavior in polynuclear systems.
Purpose of the Study:
- To characterize the binuclear [FeIII(bpca)(mu-bpca)Dy(NO3)4] complex, focusing on its SMM properties.
- To elucidate the interplay of electronic and magnetic interactions governing its behavior.
Main Methods:
- Low-temperature magnetization measurements.
- Mössbauer spectroscopy and AC susceptibility measurements.
- Advanced ab initio calculations (CASSCF, spin-orbit).
Main Results:
- Observed hysteresis and quantum tunneling at low temperatures.
- Anomalous temperature dependence of Mössbauer spectra indicating magnetic ordering.
- Calculations revealed effective Ising nature of lowest states, explaining SMM and tunneling.
Conclusions:
- The binuclear iron-lanthanide complex exhibits Single Molecule Magnet behavior.
- Magnetic ordering and quantum tunneling are key features driven by electronic interactions.
- Theoretical insights confirm the role of ligand field, spin-orbit, and exchange effects.
More Related Videos
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
06:53Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Related Concept Videos
Valence Bond Theory
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Ferromagnetism
Paramagnetism