Is Lanthanide-Transition Metal Direct Bond a Route to Achieving New Generation {3d-4f} SMMs?

2021 ◽  
Author(s):  
Gopalan Rajaraman ◽  
Abinash Swain ◽  
Asmita Sen
Keyword(s):  
Transition Metal ◽  
Single Molecule ◽  
Magnetization Reversal ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling ◽  
Direct Bond ◽  
New Generation

One of the main challenges in this area of Single Molecule Magnet is quenching quantum tunnelling of magnetization (QTM), which often undercut the magnetization reversal barrier. Among several strategies employed,...

scholarly journals Harnessing Colossal Magnetic Anisotropy in Sandwiched 3d^2-Metallocenes

2021 ◽  
Author(s):  
Sakshi Nain ◽  
Rishu Khurana ◽  
Md. Ehesan Ali
Keyword(s):  
Transition Metal ◽  
Magnetic Anisotropy ◽  
Ab Initio Calculations ◽  
Single Molecule ◽  
Magnetization Reversal ◽  
Single Molecule Magnet ◽  
Molecular Systems ◽  
Sandwiched Structure ◽  
D Values ◽  
Quantum Technology

Single-molecule magnet (SMM) based quantum technology is gaining attentions in recent years with growing focus on achieving higher barrier of magnetization reversal. Metallocenes owing unique sandwiched-structure, assure themselves as plausible molecular systems for development of novel SMMs. Here in this work, we have explicitly investigated metallocenes of first row transition metal elements, along with their one electron oxidized (cationic) and reduced (anionic) analogues, for their magnetic anisotropies (D) adopting multi-reference ab initio calculations. Herein, we report the unprecedented high D values for 3d^2 systems among all the 3d-metallocenes.

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.

A Mononuclear Transition Metal Single-Molecule Magnet in a Nuclear Spin-Free Ligand Environment

2014 ◽  
Vol 53 (19) ◽  
pp. 10716-10721 ◽  
Author(s):  
Majed S. Fataftah ◽  
Joseph M. Zadrozny ◽  
Dylan M. Rogers ◽  
Danna E. Freedman
Keyword(s):  
Transition Metal ◽  
Single Molecule ◽  
Nuclear Spin ◽  
Free Ligand ◽  
Single Molecule Magnet ◽  
Ligand Environment

Regulation of magnetic relaxation behavior by replacing 3d transition metal ions in [M2Dy2] complexes containing two different organic chelating ligands

2019 ◽  
Vol 48 (27) ◽  
pp. 10011-10022 ◽  
Author(s):  
Hui-Sheng Wang ◽  
Cheng-Ling Yin ◽  
Zhao-Bo Hu ◽  
Yong Chen ◽  
Zhi-Quan Pan ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Transition Metal Ions ◽  
Relaxation Behavior ◽  
Organic Ligands ◽  
Chelating Ligands ◽  
Single Molecule Magnet

Two [MIII2DyIII2] complexes (M = Fe for 1 and Co for 2) with mixed organic ligands were obtained. Complex 2 exhibits single molecule magnet behavior with Ueff = 64.0(9) K.

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.

Mn21Dy Cluster with a Record Magnetization Reversal Barrier for a Mixed 3d/4f Single-Molecule Magnet

2011 ◽  
Vol 50 (2) ◽  
pp. 421-423 ◽  
Author(s):  
Constantina Papatriantafyllopoulou ◽  
Wolfgang Wernsdorfer ◽  
Khalil A. Abboud ◽  
George Christou
Keyword(s):  
Single Molecule ◽  
Magnetization Reversal ◽  
Single Molecule Magnet

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.

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