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Title: Pressure dependence of the exchange interaction in the dimeric single-molecule magnet [Mn{sub 4}O{sub 3}Cl{sub 4}(O{sub 2}CEt){sub 3}(py){sub 3}]{sub 2} from inelastic neutron scattering

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
; ; ; ;  [1]; ;  [2];  [3];  [4];  [5];  [6]
  1. Department of Chemistry and Biochemistry, University of Bern, 3012 Bern (Switzerland)
  2. Department of Chemistry, University of Florida, Gainesville, Florida 32611 (United States)
  3. Institut Laue-Langevin, 6 Rue Jules Horowitz, Boite Postale 156, 38042 Grenoble Cedex 9 (France)
  4. ISIS Facility, CCLRC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX (United Kingdom)
  5. European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, Boite Postale 220, 38043 Grenoble Cedex 9 (France)
  6. ACCE, 38960 St Aupre (France)
+ Show Author Affiliations

The low-lying magnetic excitations in the dimers of single-molecule magnets [Mn{sub 4}O{sub 3}Cl{sub 4}(O{sub 2}CEt){sub 3}(py){sub 3}]{sub 2}, or (Mn{sub 4}){sub 2}, are studied by inelastic neutron scattering as a function of hydrostatic pressure. The anisotropy parameters D and B{sub 0}{sup 4}, which describe each Mn{sub 4} subunit, are essentially pressure independent, while the antiferromagnetic exchange coupling J between the two Mn{sub 4} subunits strongly depends on pressure, with an increase of 42% at 17 kbar. Additional pressure-dependent powder x-ray measurements allow a structural interpretation of the findings.

OSTI ID:
20853329
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 74, Issue 2; Other Information: DOI: 10.1103/PhysRevB.74.024405; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
Country of Publication:
United States
Language:
English

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
COUPLING
DIMERS
ELECTRONS
EXCHANGE INTERACTIONS
EXCITATION
INELASTIC SCATTERING
MAGNETS
MANGANESE COMPOUNDS
MOLECULES
NEUTRON DIFFRACTION
ORGANOMETALLIC COMPOUNDS
POWDERS
PRESSURE DEPENDENCE
X RADIATION
X-RAY DIFFRACTION