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RESEARCH PRODUCT
Magnetism and EPR spectra of the two‐sublattice manganese chain Mn2(EDTA)⋅9H2O
C.j. Gómez-garcíaJuan J. Borrás-almenarC. ZanchiniDante GatteschiEugenio Coronadosubject
MagnetismEdtaExchange InteractionsGeneral Physics and Astronomychemistry.chemical_elementManganeseMagnetic SusceptibilityElectron Spin ResonanceIonlaw.inventionlaw:FÍSICA [UNESCO]AntiferromagnetismHydratesElectron paramagnetic resonanceLine WidthsCondensed matter physicsSpinsUNESCO::FÍSICAManganese ComplexesMagnetic susceptibilityOne−Dimensional CalculationsDipoleElectron Spin Resonance ; Manganese Complexes ; Edta ; Exchange Interactions ; Magnetic Susceptibility ; Line Widths ; One−Dimensional Calculations ; HydrateschemistryCondensed Matter::Strongly Correlated Electronsdescription
We report on the magnetic behavior and single‐crystal EPR spectra of the chain complex Mn2(EDTA)⋅9H2O characterized by two different alternating sites for the manganese ions. Magnetic susceptibility data are indicative of weak antiferromagnetic exchange interactions between the manganese ions, showing a maximum of about 3 K. This behavior can be accurately described on the basis of a Heisenberg chain model that assumes classical spins, giving J/k=−0.72 K and g=2.0. The EPR spectra are typically low dimensional, with an angular dependence of the linewidth of the type (3 cos2 θ−1)n (n=4/3 or 2). Nevertheless, such a behavior cannot be reproduced from a one‐dimensional model with dipolar broadening. An alternative broadening mechanism arising from single‐ion zero‐field splitting is then suggested. Juan.J.Borras@uv.es ; Eugenio.Coronado@uv.es ; Carlos.Gomez@uv.es
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-05-01 |