scholarly journals High temperature quantum tunnelling of magnetization and thousand kelvin anisotropy barrier in a Dy2 single-molecule magnet

2021 ◽  
Author(s):  
Haipeng Wu ◽  
Min Li ◽  
Zhengqiang Xia ◽  
Vincent Montigaud ◽  
Olivier Cador ◽  
...  
Keyword(s):  
High Temperature ◽  
Crystal Field ◽  
Single Molecule ◽  
Magnetic Hysteresis ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling ◽  
Field Environment

The control of the crystal field environment within the cis/trans stereoisomers allowed the observation of a significantly enhanced anisotropy barrier to 1300 K and magnetic hysteresis opened up to 16 K.

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

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 [Dy<sub>2</sub>L<sub>2</sub>(<i>µ</i>-Cl)<sub>2</sub>(THF)<sub>2</sub>] has been made using a diamine-bis(phenolate) ligand, H<sub>2</sub>L. Magnetic studies show an energy barrier for magnetization reversal (<i>U</i><sub>eff</sub>) around 1000 K. Exchange-biasing effect is clearly seen in magnetic hysteresis with steps up to 4 K. <i>Ab</i> initio calculations exclude the possibility of pure dipolar origin of this effect leading to the conclusion that super-exchange <i>via</i> the chloride bridging ligands is important.

scholarly journals Magnetic Hysteresis at 10 K in Single Molecule Magnet Self‐Assembled on Gold

2021 ◽  
pp. 2000777
Author(s):  
Chia‐Hsiang Chen ◽  
Lukas Spree ◽  
Emmanouil Koutsouflakis ◽  
Denis S. Krylov ◽  
Fupin Liu ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Hysteresis ◽  
Single Molecule Magnet ◽  
Self Assembled

scholarly journals Exchange-bias quantum tunnelling in a CO2-based Dy4-single molecule magnet

2017 ◽  
Vol 8 (2) ◽  
pp. 1178-1185 ◽  
Author(s):  
Eufemio Moreno Pineda ◽  
Yanhua Lan ◽  
Olaf Fuhr ◽  
Wolfgang Wernsdorfer ◽  
Mario Ruben
Keyword(s):  
Single Molecule ◽  
Exchange Bias ◽  
Organic Base ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling

Herein the description of a CO2-based single molecule magnet, obtained through CO2 absorption in the presence of an organic base and a lanthanide is presented.

scholarly journals An unusual mechanism of building up of a high magnetization blocking barrier in an octahedral alkoxide Dy3+-based single-molecule magnet

2021 ◽  
Author(s):  
Jérôme Long ◽  
Aleksei O. Tolpygin ◽  
Ekaterina Mamontova ◽  
Konstantin A. Lyssenko ◽  
Dan Liu ◽  
...  
Keyword(s):  
Crystal Field ◽  
Single Molecule ◽  
Crystal Field Splitting ◽  
Field Splitting ◽  
Single Molecule Magnet

We report a new octahedral luminescent SMM exhibiting massive crystal-field splitting and an anisotropic barrier of 1385 cm−1.

A linear trinuclear ferrous single molecule magnet

2018 ◽  
Vol 47 (46) ◽  
pp. 16704-16708
Author(s):  
Shihao Liu ◽  
Yi-Fei Deng ◽  
Chang'An Li ◽  
Xiaoyong Chang ◽  
Yuan-Zhu Zhang
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Effective Energy ◽  
Single Molecule Magnet ◽  
Magnetic Hysteresis Loops

A linear trinuclear ferrous [FeII3] SMM exhibited clear magnetic hysteresis loops and a significant higher effective energy barrier in comparison with its cobalt(ii) analogue.

scholarly journals Field- and temperature-dependent quantum tunnelling of the magnetisation in a large barrier single-molecule magnet

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
You-Song Ding ◽  
Ke-Xin Yu ◽  
Daniel Reta ◽  
Fabrizio Ortu ◽  
Richard E. P. Winpenny ◽  
...  
Keyword(s):  
Single Molecule ◽  
Temperature Dependent ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling

scholarly journals A Double-Dysprosocenium Single-Molecule Magnet Bound Together with Neutral Ligands

2019 ◽  
Author(s):  
Peter Evans ◽  
Daniel Reta ◽  
Conrad Goodwin ◽  
Fabrizio Ortu ◽  
Nicholas Chilton ◽  
...  
Keyword(s):  
Single Molecule ◽  
Weak Interactions ◽  
Magnetic Hysteresis ◽  
Single Molecule Magnet ◽  
Crystal Fields ◽  
Effective Barrier ◽  
Neutral Ligands

A dinuclear dysprosocenium dication has been synthesised that is bound together by weak interactions between {Dy(Cp*)<sub>2</sub>}<sup>+</sup> fragments and neutral NEt<sub>3</sub>AlMe<sub>3</sub> molecules. The axiality of the Dy<sup>3+</sup> crystal fields are perturbed by these equatorial interactions but a relatively large effective barrier to magnetisation reversal of 860(60) cm<sup>–1</sup> and magnetic hysteresis up to 15 K are observed.

Metallogrid Single-Molecule Magnet: Solvent-Induced Nuclearity Transformation and Magnetic Hysteresis at 16 K

2016 ◽  
Vol 55 (11) ◽  
pp. 5476-5484 ◽  
Author(s):  
Wei Huang ◽  
Fu-Xing Shen ◽  
Shu-Qi Wu ◽  
Li Liu ◽  
Dayu Wu ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetic Hysteresis ◽  
Single Molecule Magnet

A Model of Single Molecule Magnet Behavior of the [CuIILTbIII(hfac)2]2 Cluster

2008 ◽  
Vol 273-276 ◽  
pp. 227-232
Author(s):  
S. Ostrovsky ◽  
O. Reu ◽  
A. Palii ◽  
Anatoly Yakovlevich Fishman ◽  
Valentin Yakovlevich Mitrofanov ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Experimental Evidence ◽  
Exchange Interaction ◽  
Crystal Field ◽  
Single Molecule ◽  
Magnetization Reversal ◽  
Total Angular Momentum ◽  
Mean Value ◽  
Single Molecule Magnet ◽  
The Mean

We report a model for the explanation of the single molecule magnet behavior of the [CuIILTbIII(hfac)2]2 cluster. The model takes into account the crystal field acting on the TbIII –ion and the exchange interaction between the TbIII and CuII ions. The energies of the low-lying levels are shown to increase with the decrease of the mean value of the z-projection of the total angular momentum of the cluster, thus forming a barrier for magnetization reversal that is in accordance with the experimental evidence.

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