Enhanced energy barriers triggered by magnetic anisotropy modulation via tuning the functional groups on the bridging ligands in Dy2 single-molecule magnets

2018 ◽  
Vol 47 (42) ◽  
pp. 15197-15205 ◽  
Author(s):  
Yaru Qin ◽  
Yu Jing ◽  
Yu Ge ◽  
Wei Liu ◽  
Yahong Li ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Functional Groups ◽  
Single Molecule ◽  
Energy Barrier ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Bridging Ligands

Two dinuclear dysprosium complexes of 1 and 2 have been synthesized and both of them exhibit SMM behavior. The energy barrier is enhanced ca. 35 K by elaborately tuning the backbones of the ligands.

Enhancing the energy barrier of dysprosium(iii) single-molecule magnets by tuning the magnetic interactions through different N-oxide bridging ligands

CrystEngComm ◽  
2019 ◽  
Vol 21 (41) ◽  
pp. 6219-6225 ◽  
Author(s):  
Juan Wang ◽  
Mingfang Yang ◽  
Juan Sun ◽  
Hui Li ◽  
Jinjin Liu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Interactions ◽  
Single Molecule Magnets ◽  
Bridging Ligands

The synergistic effect of strengthened Dy-Dy magnetic interactions and slightly enhanced symmetry of DyIII ions results in a great Ueff enhancement from 11.79 K to 226.73 K.

Efficient enhancement of magnetic anisotropy by optimizing the ligand-field in a typically tetranuclear dysprosium cluster

2015 ◽  
Vol 44 (17) ◽  
pp. 8150-8155 ◽  
Author(s):  
Jiang Liu ◽  
Yan-Cong Chen ◽  
Zhong-Xia Jiang ◽  
Jun-Liang Liu ◽  
Jian-Hua Jia ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Thermal Energy ◽  
Ligand Field ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Applied External Magnetic Field

Two tetranuclear dysprosium single molecule magnets under a zero applied external magnetic field showing high thermal energy barriers which are among the highest within the reported tetranuclear lanthanide-based SMMs.

Assembling two Dy2 single-molecule magnets with different energy barriers via fine-tuning the geometries of DyIII sites

2020 ◽  
Vol 44 (47) ◽  
pp. 20634-20642
Author(s):  
Dawei Li ◽  
Man-Man Ding ◽  
Yu Ge ◽  
David Felipe Tello Yepes ◽  
Mingyuan Sun ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Fine Tuning ◽  
Energy Barriers ◽  
Single Molecule Magnets

Two Dy2 single-molecule magnets are prepared. The energy barrier of 2 is slightly enhanced by adjusting the geometries of DyIII centers.

Rare CH3O−/CH3CH2O−-bridged nine-coordinated binuclear DyIII single-molecule magnets (SMMs) significantly regulate and enhance the effective energy barriers

CrystEngComm ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1712-1724 ◽  
Author(s):  
Sheng Zhang ◽  
Nan Shen ◽  
Sha Liu ◽  
Rong Ma ◽  
Yi-Quan Zhang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Effective Energy ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Efficient Approach

This work presents an efficient approach to regulating and enhancing the magnetic anisotropy barriers through using bridged CH3O− anion or CH3CH2O− anion and constructing triple bridges.

Interchange between coordinated and lattice solvents generates the highest energy barrier within nine-coordinated DyIII single molecule magnets

2017 ◽  
Vol 46 (34) ◽  
pp. 11159-11165 ◽  
Author(s):  
Lin Sun ◽  
Sheng Zhang ◽  
Zhijie Jiang ◽  
Qi Yang ◽  
Sanping Chen ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Energy Barrier ◽  
Easy Axis ◽  
Single Molecule Magnets

It is crucial to promote axiality to enhance easy-axis magnetic anisotropy.

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.

Correlating Blocking Temperatures in Single Molecule Magnets with Raman Relaxation

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<br>(SMM) with an energy barrier of 1110 K for thermal relaxation of<br>magnetization. The sample shows no retention of magnetization<br>even at 2 K and this led us to find a good correlation between the<br>blocking temperature and the Raman relaxation regime for SMMs.<br>The key parameter is the relaxation time (𝜏<sub>switch</sub>) at the point where<br>the Raman relaxation mechanism becomes more important than<br>Orbach.

Magnetic anisotropy on demand exploiting high-pressure as remote control: an ab initio proof-of-concept

2021 ◽  
Author(s):  
Matteo Briganti ◽  
Federico Totti
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Remote Control ◽  
Magnetic Anisotropy ◽  
Ab Initio ◽  
Single Molecule ◽  
Boiling Temperature ◽  
Proof Of Concept ◽  
Single Molecule Magnets ◽  
On Demand

Lanthanide based single molecule magnets have recently become very promising systems for creating single molecule device working at high temperature (nitrogen boiling temperature). However, the variation of direction of the...

Structural anisotropy of cyanido-bridged {CoII9WV6} single-molecule magnets induced by bidentate ligands: towards the rational enhancement of an energy barrier

2016 ◽  
Vol 52 (26) ◽  
pp. 4772-4775 ◽  
Author(s):  
Szymon Chorazy ◽  
Michał Rams ◽  
Anna Hoczek ◽  
Bernard Czarnecki ◽  
Barbara Sieklucka ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Bidentate Ligands ◽  
Single Molecule Magnets ◽  
Structural Anisotropy ◽  
Slow Magnetic Relaxation

{CoII9[WV(CN)8]6} clusters capped by odd and even number of bidentate ligands reveal the improved slow magnetic relaxation due to the significant structural anisotropy.

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