A triangular dysprosium with asymmetric central caps featuring ferromagnetic coupling and single-molecule magnet behaviour

The linear trinuclear complex cation [Fe3(DpyF)4]2+ was prepared as [Fe3(DpyF)4](BF4)2·2CH3CN. With large Fe–Fe distances of 2.78 Å, this complex demonstrates intramolecular ferromagnetic coupling between the anisotropic FeII centers (J/kB =...

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A series of goblet-like heterometallic pentanuclear [LnIIICuII4] clusters featuring ferromagnetic coupling and single-molecule magnet behavior

Chemical Communications ◽

10.1039/c2cc35935a ◽

2012 ◽

Vol 48 (87) ◽

pp. 10736 ◽

Cited By ~ 30

Author(s):

Qilong Zhu ◽

Shengchang Xiang ◽

Tianlu Sheng ◽

Daqiang Yuan ◽

Chaojun Shen ◽

...

Keyword(s):

Single Molecule ◽

Ferromagnetic Coupling ◽

Single Molecule Magnet

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Ferromagnetic coupling in a chloride-bridged erbium single-molecule magnet

Chemical Communications ◽

10.1039/c7cc02356a ◽

2017 ◽

Vol 53 (53) ◽

pp. 7322-7324 ◽

Cited By ~ 21

Author(s):

J. D. Hilgar ◽

B. S. Flores ◽

J. D. Rinehart

Keyword(s):

Single Molecule ◽

Ferromagnetic Coupling ◽

Single Molecule Magnet ◽

High Anisotropy

We present the first ferromagnetically-coupled Er3+ complex with linked, high-anisotropy Er–COT (COT2− = cyclooctatetraene dianion) subunits.

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Linear trinuclear cobalt(ii) single molecule magnet

Dalton Transactions ◽

10.1039/c4dt03545c ◽

2015 ◽

Vol 44 (6) ◽

pp. 2865-2870 ◽

Cited By ~ 23

Author(s):

Yuan-Zhu Zhang ◽

Andrew J. Brown ◽

Yin-Shan Meng ◽

Hao-Ling Sun ◽

Song Gao

Keyword(s):

Single Molecule ◽

Ferromagnetic Coupling ◽

Coordination Environment ◽

Single Molecule Magnet ◽

Drastic Effect

The first linear trinuclear [CoII3] SMM was achieved due to significant intracluster ferromagnetic coupling. This study shows that miniscule changes in the coordination environment of the cobalt centers in this structural archetype can have a drastic effect on the observation of SMM behavior.

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Two azido-bridged [2×2] cobalt(ii) grids featuring single-molecule magnet behaviour

Dalton Transactions ◽

10.1039/d0dt01461c ◽

2020 ◽

Vol 49 (27) ◽

pp. 9218-9222

Author(s):

Zhilin Guo ◽

Yi-Fei Deng ◽

Yipei Zhang ◽

Zoe Pikramenou ◽

Yuan-Zhu Zhang

Keyword(s):

Single Molecule ◽

Ferromagnetic Coupling ◽

Effective Energy ◽

Energy Barriers ◽

Single Molecule Magnet

Two Co(ii) [2 × 2] grid-like clusters containing both pyridazine and azido bridges were reported to exhibit overall intramolecular ferromagnetic coupling and field-induced single-molecule magnet behavior with the effective energy barriers up to 56 K.

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Exchange-Biasing in a Dinuclear Dysprosium(III) Single-Molecule Magnet with a Large Energy Barrier for Magnetization Reversal

10.26434/chemrxiv.10260494 ◽

2019 ◽

Author(s):

Tian Han ◽

Marcus J. Giansiracusa ◽

Zi-Han Li ◽

You-Song Ding ◽

Nicholas F. Chilton ◽

...

Keyword(s):

Single Molecule ◽

Magnetization Reversal ◽

Energy Barrier ◽

Magnetic Hysteresis ◽

Large Energy ◽

Magnetic Studies ◽

Bridging Ligands ◽

Single Molecule Magnet ◽

Exchange Biasing

A dichlorido-bridged dinuclear dysprosium(III) single-molecule magnet [Dy2L2(µ-Cl)2(THF)2] has been made using a diamine-bis(phenolate) ligand, H2L. Magnetic studies show an energy barrier for magnetization reversal (Ueff) around 1000 K. Exchange-biasing effect is clearly seen in magnetic hysteresis with steps up to 4 K. Ab initio calculations exclude the possibility of pure dipolar origin of this effect leading to the conclusion that super-exchange via the chloride bridging ligands is important.

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Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation

10.26434/chemrxiv.7067669 ◽

2018 ◽

Author(s):

Marcus J. Giansiracusa ◽

Andreas Kostopoulos ◽

George F. S. Whitehead ◽

David Collison ◽

Floriana Tuna ◽

...

Keyword(s):

Relaxation Time ◽

Single Molecule ◽

Energy Barrier ◽

Thermal Relaxation ◽

Relaxation Mechanism ◽

Blocking Temperature ◽

Single Molecule Magnets ◽

Single Molecule Magnet ◽

Key Parameter

We report a six coordinate DyIII single-molecule magnet (SMM) with an energy barrier of 1110 K for thermal relaxation of magnetization. The sample shows no retention of magnetization even at 2 K and this led us to find a good correlation between the blocking temperature and the Raman relaxation regime for SMMs. The key parameter is the relaxation time (𝜏switch) at the point where the Raman relaxation mechanism becomes more important than Orbach.

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The localized electron: magnetic properties

10.1093/oso/9780198814597.003.0002 ◽

2018 ◽

Author(s):

Jean-Pierre Launay ◽

Michel Verdaguer

Keyword(s):

Single Molecule ◽

Model Systems ◽

Ferromagnetic Coupling ◽

Single Chain ◽

Single Molecule Magnets ◽

Magnetic Systems ◽

Orbital Interactions ◽

Prussian Blue Analogues ◽

Mononuclear Complexes

After preliminaries about electron properties, and definitions in magnetism, one treats the magnetism of mononuclear complexes, in particular spin cross-over, showing the role of cooperativity and the sensitivity to external perturbations. Orbital interactions and exchange interaction are explained in binuclear model systems, using orbital overlap and orthogonality concepts to explain antiferromagnetic or ferromagnetic coupling. The phenomenologically useful Spin Hamiltonian is defined. The concepts are then applied to extended molecular magnetic systems, leading to molecular magnetic materials of various dimensionalities exhibiting bulk ferro- or ferrimagnetism. An illustration is provided by Prussian Blue analogues. Magnetic anisotropy is introduced. It is shown that in some cases, a slow relaxation of magnetization arises and gives rise to appealing single-ion magnets, single-molecule magnets or single-chain magnets, a route to store information at the molecular level.

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