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Statut |
Confirmé |
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Série |
SEM-BESSON |
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Domaines |
cond-mat |
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Date |
Lundi 6 Fevrier 2012 |
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Heure |
10:30 |
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Institut |
IMPMC |
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Salle |
Salle 1, 4ème étage, Tour 22-23, IMPMC, UPMC, 4, Place Jussieu, 75005 Paris |
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Nom de l'orateur |
Prescimone |
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Prenom de l'orateur |
Alex |
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Addresse email de l'orateur |
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Institution de l'orateur |
EastChemSchool of Chemistry – University of Edinburgh |
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Titre |
The effect of pressure on molecular magnetism |
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Résumé |
Clusters of paramagnetic metal ions have attracted intense study since the discovery that such molecules can display the phenomenon of single-molecule magnetism. The energy barrier to the relaxation of the magnetisation implies a large ground state spin multiplicity (S) and a significant zero-field splitting (D) of that ground state. The strength of coupling and the magnitude of the zero-field splitting are governed by the molecular geometry. The application of pressure can significantly change the intra-molecular bond lengths, angles and, occasionally, the connectivity: in-so-doing greatly modifies the observed magnetic parameters.
Two ‘Mn6’ SMMs, hydroxo-bridged Cu dimers and Cu-based chains can all be structurally and magnetically distorted by pressure. We describe the combined crystallographic, magnetic and EPR experiments, all performed at high pressure, on these materials.
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Numéro de preprint arXiv |
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Commentaires |
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Fichiers attachés |
- seminPRESCIMONE2012.pdf (148906 bytes)
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