Pressure induced enhancement of the magnetic ordering temperature in rhenium(IV) monomers

Woodall, C. H. et al. (2016) Pressure induced enhancement of the magnetic ordering temperature in rhenium(IV) monomers. Nature Communications, 7, 13870. (doi: 10.1038/ncomms13870) (PMID:28000676) (PMCID:PMC5187583)

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Materials that demonstrate long-range magnetic order are synonymous with information storage and the electronics industry, with the phenomenon commonly associated with metals, metal alloys or metal oxides and sulfides. A lesser known family of magnetically ordered complexes are the monometallic compounds of highly anisotropic d-block transition metals; the ‘transformation’ from isolated zero-dimensional molecule to ordered, spin-canted, three-dimensional lattice being the result of through-space interactions arising from the combination of large magnetic anisotropy and spin-delocalization from metal to ligand which induces important intermolecular contacts. Here we report the effect of pressure on two such mononuclear rhenium(IV) compounds that exhibit long-range magnetic order under ambient conditions via a spin canting mechanism, with Tc controlled by the strength of the intermolecular interactions. As these are determined by intermolecular distance, ‘squeezing’ the molecules closer together generates remarkable enhancements in ordering temperatures, with a linear dependence of Tc with pressure.

Item Type:Articles
Additional Information:Financial support of the EPSRC (EP/K033646/1, EP/K033662/1 and EP/N01331X/1) and the Spanish Ministerio de Economı´a y Competitividad (projects CTQ2013-44844-P and MDM-2015-0538 (Excellence Unit ‘Marı´a de Maeztu’)) and the Generalitat Valenciana (projects PROMETEO/2014/070 and ISIC/2012/002) is gratefully acknowledged. We acknowledge Diamond Light Source for time on Beamline I19 under Proposal MT11879.
Glasgow Author(s) Enlighten ID:Craig, Dr Gavin and Murrie, Professor Mark
Authors: Woodall, C. H., Craig, G. A., Prescimone, A., Misek, M., Cano, J., Faus, J., Probert, M. R., Parsons, S., Moggach, S., Martínez-Lillo, J., Murrie, M., Kamenev, K. V., and Brechin, E. K.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Nature Communications
Publisher:Nature Publishing Group
ISSN (Online):2041-1723
Published Online:21 December 2016
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Nature Communications 7:13870
Publisher Policy:Reproduced under a creative commons license

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
618561Pressure-tuning interactions in molecule-based magnetsMark MurrieEngineering & Physical Sciences Research Council (EPSRC)EP/K033662/1CHEM - CHEMISTRY
696981Putting the Squeeze on Molecule-Based MagnetsMark MurrieEngineering & Physical Sciences Research Council (EPSRC)EP/N01331X/1CHEM - CHEMISTRY