Ising exchange interaction in lanthanides and actinides

@article{Chibotaru2015IsingEI,
  title={Ising exchange interaction in lanthanides and actinides},
  author={Liviu F. Chibotaru and Naoya Iwahara},
  journal={New Journal of Physics},
  year={2015},
  volume={17}
}
The Ising exchange interaction is a limiting case of strong exchange anisotropy and represents a key property of many magnetic materials. Here we find the necessary and sufficient conditions to achieve Ising exchange interaction for metal sites with unquenched orbital moments. Contrary to current views, the rules established here narrow much the range of lanthanide and actinide ions that can exhibit Ising exchange interaction. It is shown that the Ising interaction can be of two types: (i… 
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It is shown that the exchange interaction between strongly anisotropic doublets of lanthanides, actinides and transition metal ions with unquenched orbital momentum contains a new s-d kinetic contribution equal in strength with the s-s one.

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This work synthesizes an array of air-stable Ln2@C80(CH2Ph) dimetallofullerenes featuring a covalent lanthanide-lanthanide bond and explores the limiting case when the role of a radical bridge is played by a single unpaired electron.

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The magnetism and magnetization blocking of a series of [Fe2 Dy2 (OH)2 (teaH)2 (RC6 H4 COO)6 ] complexes was investigated, in which teaH3 =triethanolamine and R=meta-CN (1), para-CN (2), meta-CH3 …

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The mechanism of magnetic coupling is established to rationalize the observation that LnCu complexes are strongly coupled compared to LnV complexes and postulates that both the single-ion anisotropy and the exchange interaction are needed to be targeted simultaneously to achieve a new generation {3d-4f} single molecule magnets (SMM).

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The analysis of the natural orbitals evidences a superexchange mechanism through a σCH* orbital of the bridging cycle favored by a local 4fσ/5dσ hybridization and that the δ type orbitals, both the HOMOs of the ligands and the virtual fδ orbitals of the cerium atoms play an important polarization role.

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