A New Family of 1D Exchange Biased Heterometal Single-Molecule Magnets: Observation of Pronounced Quantum Tunneling Steps in the Hysteresis Loops of Quasi-Linear {Mn2Ni3} Clusters

2011 ◽  
Vol 133 (10) ◽  
pp. 3433-3443 ◽  
Author(s):  
Animesh Das ◽  
Klaus Gieb ◽  
Yulia Krupskaya ◽  
Serhiy Demeshko ◽  
Sebastian Dechert ◽  
...  
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Hysteresis Loops ◽  
Single Molecule Magnets ◽  
New Family

Enhancing the Quantum Properties of Manganese-Lanthanide Single-Molecule Magnets: Observation of Quantum Tunneling Steps in the Hysteresis Loops of a {Mn12Gd} Cluster

2009 ◽  
Vol 48 (3) ◽  
pp. 521-524 ◽  
Author(s):  
Theocharis C. Stamatatos ◽  
Simon J. Teat ◽  
Wolfgang Wernsdorfer ◽  
George Christou
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Hysteresis Loops ◽  
Single Molecule Magnets ◽  
Quantum Properties

Enhancing the Quantum Properties of Manganese-Lanthanide Single-Molecule Magnets: Observation of Quantum Tunneling Steps in the Hysteresis Loops of a {Mn12Gd} Cluster

2009 ◽  
Vol 121 (3) ◽  
pp. 529-532 ◽  
Author(s):  
Theocharis C. Stamatatos ◽  
Simon J. Teat ◽  
Wolfgang Wernsdorfer ◽  
George Christou
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Hysteresis Loops ◽  
Single Molecule Magnets ◽  
Quantum Properties

scholarly journals Quantum Tunneling of Magnetization in Lanthanide Single-Molecule Magnets: Bis(phthalocyaninato)terbium and Bis(phthalocyaninato)dysprosium Anions

2005 ◽  
Vol 117 (19) ◽  
pp. 2991-2995 ◽  
Author(s):  
Naoto Ishikawa ◽  
Miki Sugita ◽  
Wolfgang Wernsdorfer
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Single Molecule Magnets ◽  
Quantum Tunneling Of Magnetization

Single-Molecule Magnets:  A Large Mn30Molecular Nanomagnet Exhibiting Quantum Tunneling of Magnetization

2004 ◽  
Vol 126 (7) ◽  
pp. 2156-2165 ◽  
Author(s):  
Monica Soler ◽  
Wolfgang Wernsdorfer ◽  
Kirsten Folting ◽  
Maren Pink ◽  
George Christou
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Single Molecule Magnets ◽  
Quantum Tunneling Of Magnetization

scholarly journals Inelastic transport detection of spin quantum tunneling and spin relaxation in single-molecule magnets in the absence of a magnetic field

2012 ◽  
Vol 85 (16) ◽  
Author(s):  
Rui-Qiang Wang ◽  
R. Shen ◽  
Shi-Liang Zhu ◽  
Baigeng Wang ◽  
D. Y. Xing
Keyword(s):  
Magnetic Field ◽  
Spin Relaxation ◽  
Single Molecule ◽  
Quantum Tunneling ◽  
Single Molecule Magnets ◽  
Spin Quantum ◽  
Inelastic Transport

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.

scholarly journals Studies of hysteresis and quantum tunnelling of the magnetisation in dysprosium(iii) single molecule magnets

2019 ◽  
Vol 48 (24) ◽  
pp. 8541-8545 ◽  
Author(s):  
Fabrizio Ortu ◽  
Daniel Reta ◽  
You-Song Ding ◽  
Conrad A. P. Goodwin ◽  
Matthew P. Gregson ◽  
...  
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Single Molecule Magnets ◽  
Quantum Tunnelling

We report a study of quantum tunneling of the magnetisation in three Dy(iii) single-molecule magnets.

scholarly journals Quantum tunneling of magnetization in trigonal single-molecule magnets

2012 ◽  
Vol 85 (1) ◽  
Author(s):  
Junjie Liu ◽  
Enrique del Barco ◽  
Stephen Hill
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Single Molecule Magnets ◽  
Quantum Tunneling Of Magnetization

Single Crystal High Frequency Cavity-based EPR Spectroscopy of Single Molecule Magnets

2002 ◽  
Vol 746 ◽  
Author(s):  
S. Hill ◽  
R. S. Edwards ◽  
S. I. Jones ◽  
S. Maccagnano ◽  
J. M. North ◽  
...  
Keyword(s):  
Single Crystal ◽  
Single Molecule ◽  
High Frequency ◽  
Quantum Tunneling ◽  
Perturbation Technique ◽  
Hysteresis Loops ◽  
Direct Determination ◽  
High Sensitivity ◽  
Field Orientation ◽  
Effective Spin

ABSTRACTWe report high frequency electron paramagnetic resonance (EPR) investigations of a series of high spin (total spin up to S = 10) manganese and nickel complexes which have been shown to exhibit single molecule magnetism, including low temperature (below ∼ 1K) hysteresis loops and resonant magnetic quantum tunneling. A cavity perturbation technique enables high sensitivity oriented single crystal EPR measurements spanning a very wide frequency range (16 to 200+ GHz). Fitting of the frequency and field orientation dependence of EPR spectra allows direct determination of the effective spin Hamiltonian parameters. Studies on a range of materials with varying (approximately axial) site symmetries facilitates an assessment of the role of transverse anisotropy (terms in the Hamiltonian that do not commute with ŝz) in the magnetic quantum tunneling phenomenon.

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