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.

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,...

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

Wheel-type heterometallic ferromagnetic clusters: [Ni7−xMx(HL)6(μ3-OMe)4(μ3-OH)2]Cl2 (M = Zn, Co, Mn; x = 1, 3)

2018 ◽  
Vol 47 (46) ◽  
pp. 16422-16428 ◽  
Author(s):  
Fumiya Kobayashi ◽  
Ryo Ohtani ◽  
Sotaro Kusumoto ◽  
Leonard F. Lindoy ◽  
Shinya Hayami ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Metal Ion ◽  
Heterometallic Clusters ◽  
Single Molecule Magnet ◽  
Ferromagnetic Properties ◽  
Behavior Based

Wheel-type heptanuclear heterometallic clusters display metal ion dependent ferromagnetic properties and express single molecule magnet behavior based on the magnetic anisotropy.

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.

Fine-tuning the type of equatorial donor atom in pentagonal bipyramidal Dy(iii) complexes to enhance single-molecule magnet properties

2019 ◽  
Vol 48 (43) ◽  
pp. 16384-16394 ◽  
Author(s):  
Haipeng Wu ◽  
Min Li ◽  
Bing Yin ◽  
Zhengqiang Xia ◽  
Hongshan Ke ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Electronic Effect ◽  
Fine Tuning ◽  
Donor Atom ◽  
Single Molecule Magnet

Upon fine-tuning an equatorial donor, the electronic effect is implemented to significantly enhance magnetic anisotropy in pentagonal bipyramidal DyIII complexes.

scholarly journals Probing transverse magnetic anisotropy by electronic transport through a single-molecule magnet

2015 ◽  
Vol 91 (3) ◽  
Author(s):  
M. Misiorny ◽  
E. Burzurí ◽  
R. Gaudenzi ◽  
K. Park ◽  
M. Leijnse ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Electronic Transport ◽  
Transverse Magnetic ◽  
Single Molecule Magnet

scholarly journals On Approaching the Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal Dysprosium(III) Single-Molecule Magnet

2016 ◽  
Vol 55 (52) ◽  
pp. 16071-16074 ◽  
Author(s):  
You-Song Ding ◽  
Nicholas F. Chilton ◽  
Richard E. P. Winpenny ◽  
Yan-Zhen Zheng
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Single Molecule Magnet
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