Related Experiment Video
Updated: Mar 23, 2026
08:55
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
9.0K
Rare double spin canting antiferromagnetic behaviours in a [Co24] cluster
Guang-Ming Liang1, Qing-Ling Ni, Hua-Hong Zou
1School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China. wang1_xj@aliyun.com.
Chemical Communications (Cambridge, England)
|March 23, 2016
Summary
A novel fish-basket-shaped cobalt cluster ([Co24]) was synthesized and characterized. Magnetic analysis revealed unique spin canting behaviors, including spin flop and hysteresis, indicating potential for advanced magnetic materials.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Magnetochemistry
Background:
- Complex polynuclear metal clusters offer unique magnetic properties.
- The rational design of molecular magnetic materials is an active area of research.
- Cobalt-oxygen frameworks are known for their diverse magnetic interactions.
Purpose of the Study:
- To synthesize and structurally characterize a novel, large cobalt cluster.
- To investigate the magnetic properties of the synthesized [Co24] cluster.
- To understand the spin canting phenomena in this unique cluster architecture.
Main Methods:
- Single-crystal X-ray diffraction for structural determination.
- SQUID magnetometry for magnetic property analysis.
- Analysis of magnetic susceptibility and field-dependent magnetization.
Main Results:
- A unique fish-basket-shaped [Co24] cluster was successfully synthesized.
- The cluster exhibits two distinct spin canting orders: spin flop and a small hysteresis.
- Key magnetic parameters such as coercive field (661 Oe) and remanent magnetization (0.466 Nβ) were determined.
Conclusions:
- The [Co24] cluster displays complex magnetic behavior driven by its specific structure.
- The observed spin canting and hysteresis suggest potential applications in molecular magnetism.
- This work expands the library of complex cobalt clusters with interesting magnetic properties.
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
8.7K
09:00Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
10.6K
Related Concept Videos
03:02Colors and Magnetism
14.5K
Color in Coordination Complexes
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...
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...
14.5K
02:42Valence Bond Theory
11.6K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.6K
01:31Ferromagnetism
3.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.4K
01:17Spin–Spin Coupling: One-Bond Coupling
1.6K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.6K
01:08Spin–Spin Coupling Constant: Overview
1.6K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.6K
01:03Atomic Nuclei: Nuclear Spin State Overview
2.2K
NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
2.2K