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.

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

Magnetic Exchange Effects in {CrIII2DyIII2} Single Molecule Magnets Containing Alcoholamine Ligands

2014 ◽  
Vol 67 (11) ◽  
pp. 1581 ◽  
Author(s):  
Stuart K. Langley ◽  
Daniel P. Wielechowski ◽  
Boujemaa Moubaraki ◽  
Brendan F. Abrahams ◽  
Keith S. Murray
Keyword(s):  
Single Molecule ◽  
Magnetic Hysteresis ◽  
Hysteresis Loops ◽  
Magnetic Studies ◽  
Single Molecule Magnets ◽  
Magnetic Exchange ◽  
Bridging Ligands ◽  
Metallic Core ◽  
Ligand Coordination ◽  
Magnetic Hysteresis Loops

The synthesis and magnetic characterisation of four new heterometallic {CrIII2DyIII2} complexes 2–5 are described. The present work follows on from a recently isolated complex [CrIII2DyIII2(OMe)2(O2CPh)4(mdea)2(NO3)2] (1) (mdeaH2 = N-methyldiethanolamine), which displayed impressive single molecule magnet (SMM) properties, notably highly coercive magnetic hysteresis loops below 3.5 K. Compounds 1–5 all display a planar butterfly type metallic core arrangement, with the DyIII ions occupying the central body positions and the CrIII ion the outer wing positions. The core is stabilized by the amine–diolate, and carboxylate bridging ligands. Variation of the amine–diolate ligand resulted in several structural analogues which maintain the same metallic core, but differ from the parent 1 in the outer ligand coordination environment. Magnetic studies reveal complexes 2–5 also display SMM behaviour, unambiguously confirmed via low temperature magnetic hysteresis loops, each displaying wide coercive fields, a rare occurrence for lanthanoid-based SMMs.

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.

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 large barrier single-molecule magnet without magnetic memory

2019 ◽  
Vol 48 (29) ◽  
pp. 10795-10798 ◽  
Author(s):  
Marcus J. Giansiracusa ◽  
Susan Al-Badran ◽  
Andreas K. Kostopoulos ◽  
George F. S. Whitehead ◽  
David Collison ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Hysteresis ◽  
Thermal Relaxation ◽  
Magnetic Memory ◽  
Single Molecule Magnet

We report a six coordinate DyIII single-molecule magnet (SMM) with an energy barrier of 1110 K for thermal relaxation of magnetization, but no magnetic hysteresis above 2 K.

Transition Metal Single-Molecule Magnets: A {Mn31} Nanosized Cluster with a Large Energy Barrier of ∼60 K and Magnetic Hysteresis at ∼5 K

2017 ◽  
Vol 139 (44) ◽  
pp. 15644-15647 ◽  
Author(s):  
Parisa Abbasi ◽  
Kevan Quinn ◽  
Dimitris I. Alexandropoulos ◽  
Marko Damjanović ◽  
Wolfgang Wernsdorfer ◽  
...  
Keyword(s):  
Transition Metal ◽  
Single Molecule ◽  
Energy Barrier ◽  
Magnetic Hysteresis ◽  
Large Energy ◽  
Single Molecule Magnets

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.

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