Related Experiment Video
Updated: May 13, 2026
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Magnetically Diluted Dy3+ and Yb3+ Squarates Showing Relaxation Tuning and Matrix Dependence
Rina Takano1, Takayuki Ishida1
1Department of Engineering Science, The University of Electro-Communications, Chofu 182-8585, Tokyo, Japan.
Molecules (Basel, Switzerland)
|January 25, 2025
Summary
Diamagnetic dilution of rare-earth squarates modifies single-ion magnet behavior. Diluted dysprosium compounds exhibit out-of-phase AC susceptibility without a DC field, unlike undiluted forms.
Area of Science:
- Materials Science
- Solid State Chemistry
- Magnetism
Background:
- Rare-earth (RE) squarate compounds (RE-sq) form isostructural crystals.
- Single-ion magnet (SIM) behavior is crucial for molecular magnetism applications.
- Diamagnetic dilution is a strategy to tune magnetic properties.
Purpose of the Study:
- To investigate the effect of diamagnetic dilution on SIM behavior in Y2(sq)3(H2O)4.
- To compare the magnetic properties of diluted and undiluted Dy-sq and Yb-sq compounds.
- To explore the role of the diamagnetic matrix (Y vs. Lu) in SIM characteristics.
Main Methods:
- Synthesis and structural characterization of [Y2(sq)3(H2O)4].
- Preparation of 1% diluted Dy@Y-sq, Dy@Lu-sq, Yb@Y-sq, and Yb@Lu-sq compounds.
- AC and DC magnetic susceptibility measurements under varying DC bias fields (HDC) and temperatures.
Main Results:
- Diluted Dy@Y-sq and Dy@Lu-sq showed AC magnetic susceptibility peaks at HDC = 0 Oe, indicating SIM behavior.
- Undiluted Dy-sq lacked AC out-of-phase response under the same conditions.
- Yb@Y-sq exhibited field-induced SIM behavior, while Yb@Lu-sq showed temperature-independent relaxation at 2 K, possibly due to quantum tunneling.
Conclusions:
- Diamagnetic dilution is an effective method to induce or modify SIM properties in RE-sq compounds.
- The Y/Lu matrix influences spin-phonon coupling and overall SIM performance.
- The study highlights the versatility of dilution for tailoring molecular magnet characteristics.
More Related Videos
Related Concept Videos
02:42Valence Bond Theory
8.4K
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...
8.4K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.3K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.3K
03:02Colors and Magnetism
11.5K
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...
11.5K
01:13¹H NMR: Complex Splitting
1.2K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
1.2K
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
999
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
999
01:23Atomic Nuclei: Nuclear Relaxation Processes
604
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.
604