scholarly journals Interaction of spin and vibrations in transport through single-molecule magnets

2011 ◽  
Vol 2 ◽  
pp. 693-698 ◽  
Author(s):  
Falk May ◽  
Maarten R Wegewijs ◽  
Walter Hofstetter
Keyword(s):  
Single Molecule ◽  
Kondo Effect ◽  
Magnetic Field Dependence ◽  
Quantum Spin ◽  
Single Molecule Magnets ◽  
Numerical Renormalization Group ◽  
Transverse Anisotropy ◽  
Single Molecule Magnet ◽  
Spin Tunneling ◽  
Spin Scattering

We study electron transport through a single-molecule magnet (SMM) and the interplay of its anisotropic spin with quantized vibrational distortions of the molecule. Based on numerical renormalization group calculations we show that, despite the longitudinal anisotropy barrier and small transverse anisotropy, vibrational fluctuations can induce quantum spin-tunneling (QST) and a QST-Kondo effect. The interplay of spin scattering, QST and molecular vibrations can strongly enhance the Kondo effect and induce an anomalous magnetic field dependence of vibrational Kondo side-bands.

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.

Recent advances in lanthanide coordination polymers and clusters with magnetocaloric effect or single-molecule magnet behavior

2021 ◽  
Author(s):  
Jun-Jie Hu ◽  
Yan Peng ◽  
Sui-Jun Liu ◽  
He-Rui Wen
Keyword(s):  
Quantum Computing ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Coordination Polymers ◽  
Single Molecule ◽  
Information Storage ◽  
Lanthanide Ions ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Lanthanide Coordination Polymers

The molecular magnetorefrigerant materials for low-temperature magnetic refrigeration and single-molecule magnets for high-density information storage and quantum computing have received extensive attention from chemists and magnetic experts. Lanthanide ions with...

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].

Transverse anisotropy of the single-molecule magnet Mn12-PrCl

2004 ◽  
Vol 272-276 ◽  
pp. E745-E747 ◽  
Author(s):  
M Heu ◽  
S.W Yoon ◽  
W.S Jeon ◽  
D.-Y Jung ◽  
B.J Suh ◽  
...  
Keyword(s):  
Single Molecule ◽  
Transverse Anisotropy ◽  
Single Molecule Magnet

scholarly journals Single-molecule magnet properties of a monometallic dysprosium pentalene complex

2018 ◽  
Vol 54 (51) ◽  
pp. 7085-7088 ◽  
Author(s):  
Alexander F. R. Kilpatrick ◽  
Fu-Sheng Guo ◽  
Benjamin M. Day ◽  
Akseli Mansikkamäki ◽  
Richard A. Layfield ◽  
...  
Keyword(s):  
Single Molecule ◽  
Energy Barriers ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet ◽  
Dysprosium Complex

The pentalene-ligated dysprosium complex [(η8-Pn†)Dy(Cp*)] (1Dy) (Pn† = [1,4-(iPr3Si)2C8H4]2−) and its magnetically dilute analogue are single-molecule magnets, with energy barriers of 245 cm−1.

scholarly journals Fulvalene as a platform for the synthesis of a dimetallic dysprosocenium single-molecule magnet

2020 ◽  
Vol 11 (22) ◽  
pp. 5745-5752 ◽  
Author(s):  
Mian He ◽  
Fu-Sheng Guo ◽  
Jinkui Tang ◽  
Akseli Mansikkamäki ◽  
Richard A. Layfield
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet

A series of fulvalene-supported dimetallic dysprosium metallocene SMMs provides a roadmap to poly-cationic dysprosocenium single-molecule magnets.

scholarly journals Kondo effect in single-molecule magnet transistors

2008 ◽  
Vol 78 (5) ◽  
Author(s):  
Gabriel González ◽  
Michael N. Leuenberger ◽  
Eduardo R. Mucciolo
Keyword(s):  
Single Molecule ◽  
Kondo Effect ◽  
Single Molecule Magnet

A family of novel Mn3Ln4 clusters displaying single-molecule magnet behavior

2014 ◽  
Vol 43 (44) ◽  
pp. 16737-16744 ◽  
Author(s):  
Hui Chen ◽  
Cheng-Bing Ma ◽  
Ming-Qiang Hu ◽  
Hui-Min Wen ◽  
Chang-Neng Chen
Keyword(s):  
Single Molecule ◽  
Single Molecule Magnets ◽  
Single Molecule Magnet

A family of novel Mn3Ln4 clusters: single-molecule magnets and the first structurally characterized 3d/4f clusters containing the 3-methyloxysalicylaldoximate ligand.

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