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RESEARCH PRODUCT
Prediction of Magnetic Properties in Oxovanadium(IV) Phosphates: The Role of the Bridging PO4 Anions
Pedro AmorósJ. AlamoJuan CanoDaniel Beltrán-porterManuel Roca† And Aurelio Beltrán-porterM. Dolores Marcossubject
Inorganic Chemistrychemistry.chemical_compoundCrystallographychemistryAtomic orbitalMagnetochemistrySpin transferLamellar structureOxovanadium IVPhysical and Theoretical ChemistryPhosphateMagnetic susceptibilitydescription
Oxovanadium phosphates constitute a crystallochemically very rich family that, in turn, results in a seemingly intricate magnetochemistry including from isolated dimers to 3-D systems. This magnetic diversity is due, in part, to the possible participation of phosphate groups in the spin transfer between VIV centers. This way, 31P solid-state NMR becomes a key tool in determining the exchange paths involving phosphorus orbitals. The magnetic behavior of several layered oxovanadium phosphates M(VOPO4)2·4H2O (M = Na+, Ca2+, Ba2+, and Pb2+) has been investigated. Like it occurs in the case of other previously studied lamellar derivatives, the best fit of the temperature-dependent magnetic susceptibility data is obtained for a 2-D model. This is consistent with chairlike V(OPO)2V exchange pathways (i.e., through di-μ-(O,O‘)phosphate bridges). Both these results and those previously available for other oxovanadium phosphates can be nicely correlated with the structural data focusing the attention on the topolog...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-06-01 |