scholarly journals Quenching the Quantum Tunneling of Magnetization in Heterometallic Octanuclear {TMIII4DyIII4} (TM=Co and Cr) Single-Molecule Magnets by Modification of the Bridging Ligands and Enhancing the Magnetic Exchange Coupling

2017 ◽  
Vol 23 (7) ◽  
pp. 1654-1666 ◽  
Author(s):  
Kuduva R. Vignesh ◽  
Stuart K. Langley ◽  
Keith S. Murray ◽  
Gopalan Rajaraman
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Exchange Coupling ◽  
Single Molecule Magnets ◽  
Magnetic Exchange ◽  
Bridging Ligands ◽  
Quantum Tunneling Of Magnetization ◽  
Magnetic Exchange Coupling

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

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.

An Azophenine Radical-Bridged Fe2 Single-Molecule Magnet with Record Magnetic Exchange Coupling

2013 ◽  
Vol 135 (45) ◽  
pp. 16845-16848 ◽  
Author(s):  
Ie-Rang Jeon ◽  
Jesse G. Park ◽  
Dianne J. Xiao ◽  
T. David Harris
Keyword(s):  
Single Molecule ◽  
Exchange Coupling ◽  
Magnetic Exchange ◽  
Single Molecule Magnet ◽  
Magnetic Exchange Coupling

Nickel(II)-Lanthanide(III) Magnetic Exchange Coupling Influencing Single-Molecule Magnetic Features in {Ni2Ln2} Complexes

2014 ◽  
Vol 20 (44) ◽  
pp. 14235-14239 ◽  
Author(s):  
Naushad Ahmed ◽  
Chinmoy Das ◽  
Shefali Vaidya ◽  
Stuart K. Langley ◽  
Keith S. Murray ◽  
...  
Keyword(s):  
Single Molecule ◽  
Exchange Coupling ◽  
Magnetic Exchange ◽  
Magnetic Exchange Coupling ◽  
Magnetic Features

scholarly journals An 'Intermetallic' Molecular Nanomagnet with the Lanthanide Coordinated Only by Transition Metals

2022 ◽  
Author(s):  
Michał Magott ◽  
Maria Brzozowska ◽  
Stanisław Baran ◽  
Veacheslav Vieru ◽  
Dawid Pinkowicz
Keyword(s):  
Single Molecule ◽  
Quantum Tunneling ◽  
Exchange Interactions ◽  
P Element ◽  
Magnetic Memory ◽  
Magnetic Exchange ◽  
Single Molecule Magnet ◽  
Molecular Nanomagnets ◽  
Quantum Tunneling Of Magnetization ◽  
Magnetic Ion

The best performing molecular nanomagnets are currently designed by carefully arranging p-element donor atoms (usually carbon, nitrogen and/or oxygen) around the central magnetic ion. Inspired by the structure of the hardest intermetallic magnet SmCo5, we have demonstrated a nanomagnetic molecule where the central lanthanide (Ln) ion Er is coordinated solely by three transition metal (TM) ions in a perfectly trigonal planar fashion. The molecule [Er(ReCp2)3] (ErRe3) constitutes the first example of a molecular nanomagnet (MNM; or single molecule magnet SMM) with unsupported Ln-TM bonds and paves the way towards molecular intermetallics with strong direct magnetic exchange interactions. Such interactions are believed to be crucial for quenching the quantum tunneling of magnetization which limits the application of Ln-SMMs as sub-nanometer magnetic memory units.

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