Quantum tunnelling of magnetization in the single-molecule magnet Mn6

2009 ◽  
Vol 33 (6) ◽  
pp. 1231 ◽  
Author(s):  
Stefan Bahr ◽  
Constantinos J. Milios ◽  
Leigh F. Jones ◽  
Euan K. Brechin ◽  
Vincent Mosser ◽  
...  
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling

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.

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.

scholarly journals Field- and temperature-dependent quantum tunnelling of the magnetisation in a large barrier single-molecule magnet

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
You-Song Ding ◽  
Ke-Xin Yu ◽  
Daniel Reta ◽  
Fabrizio Ortu ◽  
Richard E. P. Winpenny ◽  
...  
Keyword(s):  
Single Molecule ◽  
Temperature Dependent ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling

scholarly journals Quantum tunnelling of the magnetisation in single-molecule magnet isotopologue dimers

2019 ◽  
Vol 10 (19) ◽  
pp. 5138-5145 ◽  
Author(s):  
Eufemio Moreno-Pineda ◽  
Gheorghe Taran ◽  
Wolfgang Wernsdorfer ◽  
Mario Ruben
Keyword(s):  
Low Temperature ◽  
Field Dependence ◽  
Single Molecule ◽  
Low Temperatures ◽  
Relaxation Rates ◽  
Nuclear Spins ◽  
Magnetic Studies ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling ◽  
Process Observation

Low-temperature magnetic studies of two isotopologues dimers, with and without nuclear spins, reveal that, at very low temperatures, the nuclear spin facilitates the coupling to the phonon bath enhancing the direct relaxation process; observation reflected in the temperature and field dependence of the relaxation rates, whilst at higher temperatures the effect of the nuclear spins is less relevant.

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 Carbonyl Back-Bonding Influencing the Rate of Quantum Tunnelling in a Dysprosium Metallocene Single-Molecule Magnet

2019 ◽  
Vol 59 (1) ◽  
pp. 642-647 ◽  
Author(s):  
Richard Collins ◽  
María José Heras Ojea ◽  
Akseli Mansikkamäki ◽  
Jinkui Tang ◽  
Richard A. Layfield
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnet ◽  
Quantum Tunnelling ◽  
Back Bonding

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.

Sign in / Sign up

Export Citation Format

Share Document