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

2020 ◽  
Vol 26 (30) ◽  
pp. 6773-6777 ◽  
Author(s):  
Tian Han ◽  
Marcus J. Giansiracusa ◽  
Zi‐Han Li ◽  
You‐Song Ding ◽  
Nicholas F. Chilton ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Large Energy ◽  
Single Molecule Magnet ◽  
Exchange Biasing

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.

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 A dichlorido-bridged dinuclear Dy(iii) single-molecule magnet with an effective energy barrier larger than 600 K

2019 ◽  
Vol 55 (55) ◽  
pp. 7930-7933 ◽  
Author(s):  
Tian Han ◽  
You-Song Ding ◽  
Zi-Han Li ◽  
Ke-Xin Yu ◽  
Yuan-Qi Zhai ◽  
...  
Keyword(s):  
Single Molecule ◽  
Magnetization Reversal ◽  
Energy Barrier ◽  
Large Energy ◽  
Effective Energy ◽  
Single Molecule Magnet

A large energy barrier for magnetization reversal of about 623 K is observed in a dichlorido-bridged Dy(iii) dimer.

Dy2@C79N: a new member of dimetalloazafullerenes with strong single molecular magnetism

Nanoscale ◽  
2020 ◽  
Vol 12 (20) ◽  
pp. 11130-11135 ◽  
Author(s):  
Yuanyuan Wang ◽  
Jin Xiong ◽  
Jie Su ◽  
Ziqi Hu ◽  
Fang Ma ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Molecular Magnetism ◽  
Blocking Temperature ◽  
Large Energy ◽  
Single Molecule Magnet

The azafullerene Dy2@C79N is found to be a single molecule magnet with large energy barrier and high blocking temperature of magnetization.

scholarly journals A monometallic lanthanide bis(methanediide) single molecule magnet with a large energy barrier and complex spin relaxation behaviour

2016 ◽  
Vol 7 (1) ◽  
pp. 155-165 ◽  
Author(s):  
Matthew Gregson ◽  
Nicholas F. Chilton ◽  
Ana-Maria Ariciu ◽  
Floriana Tuna ◽  
Iain F. Crowe ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Single Molecule ◽  
Energy Barrier ◽  
Large Energy ◽  
Relaxation Behaviour ◽  
Energy Barriers ◽  
Single Molecule Magnet ◽  
Complex Spin

We report a monometallic dysprosium(iii) single molecule magnet with record energy barriers and unusual spin relaxation behaviour.

scholarly journals Bromine-bridged Dy2 single-molecule magnet: magnetic anisotropy driven by cis/trans stereoisomers

2019 ◽  
Vol 55 (97) ◽  
pp. 14661-14664 ◽  
Author(s):  
Min Li ◽  
Haipeng Wu ◽  
Zhengqiang Xia ◽  
Vincent Montigaud ◽  
Olivier Cador ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Moments ◽  
Magnetic Interactions ◽  
Large Energy ◽  
Single Molecule Magnet

The peculiar cis/trans stereoisomers in a bromine-bridged Dy2 single-molecule magnet drive the orthogonal magnetic moments and tune the magnetic interactions, leading to a large energy barrier of 684 K.

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.

Slow magnetic relaxation in dinuclear dysprosium and holmium phenoxide bridged complexes: a Dy2 single molecule magnet with a high energy barrier

2021 ◽  
Author(s):  
Matilde Fondo ◽  
Julio Corredoira-Vázquez ◽  
Ana M. Garcia-Deibe ◽  
Jesus Sanmartin Matalobos ◽  
Silvia Gómez-Coca ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
High Energy ◽  
Single Molecule Magnet ◽  
High Energy Barrier ◽  
Slow Magnetic Relaxation

Dinuclear [M(H3L1,2,4)]2 (M = Dy, Dy2; M = Ho, Ho2) complexes were isolated from an heptadentate aminophenol ligand. The crystal structures of Dy2·2THF, and the pyridine adducts Dy2·2Py and Ho2·2Py,...

Polyoxometalate-Supported Lanthanoid Single-Molecule Magnets

2014 ◽  
Vol 67 (11) ◽  
pp. 1542 ◽  
Author(s):  
Michele Vonci ◽  
Colette Boskovic
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Relaxation ◽  
Donor Ligands ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Coordination Numbers ◽  
Oxygen Donor ◽  
Slow Magnetic Relaxation

Polyoxometalates are robust and versatile multidentate oxygen-donor ligands, eminently suitable for coordination to trivalent lanthanoid ions. To date, 10 very different structural families of such complexes have been found to exhibit slow magnetic relaxation due to single-molecule magnet (SMM) behaviour associated with the lanthanoid ions. These families encompass complexes with between one and four of the later lanthanoid ions: Tb, Dy, Ho, Er, and Yb. The lanthanoid coordination numbers vary between six and eleven and a range of coordination geometries are evident. The highest energy barrier to magnetisation reversal measured to date for a lanthanoid–polyoxometalate SMM is Ueff/kB = 73 K for the heterodinuclear Dy–Eu compound (Bu4N)8H4[DyEu(OH)2(γ-SiW10O36)2].

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