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Experimental and theoretical study of exchange and vibronic interactions in compounds containing orbitally degenerate or quasi-degenerate metal ions: Prospects for practical applications

English title Experimental and theoretical study of exchange and vibronic interactions in compounds containing orbitally degenerate or quasi-degenerate metal ions: Prospects for practical applications
Applicant Tregenna-Piggott Philip Louis
Number 111004
Funding scheme SCOPES
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.10.2005 - 30.09.2008
Approved amount 71'913.00
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All Disciplines (2)

Discipline
Condensed Matter Physics
Theoretical Physics

Keywords (5)

Valence tautomerism; Fluoromanganates; Single molecule magnets; Cooperative phenomena; Jahn-Teller effect

Lay Summary (English)

Lead
Lay summary
This project concerns the study of compounds containing orbitally degenerate or quasi-degenerate transition metal ions such as high-spinMn(III) and Co(II) ions in octahedral or quasi-octahedral ligand environments, and rare-earth Tb(III) and Dy(III) ions with first-order orbital angular momenta. Three classes of compounds of current interest will be investigated: 1) 3d-4f Single Molecule Magnets (SMMs), 2) hexa-amine fluoromanganates(III), and 3) valence-tautomeric compounds.Experimental characterization of these systems, primarily using Inelastic Neutron Scattering (INS) technique, High-Field Multi-Frequency EPR (HFMF EPR), far infra-red spectroscopy, and time-resolved extended X-ray absorption fine structure (EXAFS) technique will be complemented by the comprehensive theoretical description of the single ion anisotropy, orbitally-dependent superexchange, vibronic and elastic interactions, and the cooperative Jahn-Teller effect.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Associated projects

Number Title Start Funding scheme
121246 Acquisition of fluorinated mica crystals for the backscattering instrument MARS 01.04.2009 R'EQUIP

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