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

Christopher H. Woodall, Gavin A. Craig, Alessandro Prescimone, Martin Misek, Joan Cano, Juan Faus, Michael R. Probert, Simon Parsons, Stephen Moggach, José Martínez-Lillo (), Mark Murrie, Konstantin V. Kamenev () and Euan K. Brechin ()
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Christopher H. Woodall: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh
Gavin A. Craig: WestCHEM School of Chemistry, University of Glasgow, University Avenue
Alessandro Prescimone: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh
Martin Misek: School of Physics and Centre for Science at Extreme Conditions, The University of Edinburgh
Joan Cano: Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València
Juan Faus: Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València
Michael R. Probert: School of Chemistry, Newcastle University
Simon Parsons: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh
Stephen Moggach: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh
José Martínez-Lillo: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh
Mark Murrie: WestCHEM School of Chemistry, University of Glasgow, University Avenue
Konstantin V. Kamenev: School of Engineering and Centre for Science at Extreme Conditions, The University of Edinburgh
Euan K. Brechin: EaStCHEM School of Chemistry and Centre for Science at Extreme Conditions, The University of Edinburgh

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract 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.

Date: 2016
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DOI: 10.1038/ncomms13870

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