Changes in magnetic couplings after chimie douce reactions: Magnetic structures of LiMnXO{sub 4}(OD) (X = P, As)
- Universidad de Malaga (Spain)
- Univ. of Cambridge (United Kingdom); and others
The structural and magnetic changes that take place after the lithium exchange reactions of MnXO{sub 4}{center_dot}D{sub 2}O to give LiMnXO{sub 4} (OD) (X = P, As) have been studied by magnetic susceptibility and variable-temperature neutron diffraction techniques. The crystal structures of the lithium derivatives have been refined at room temperature and 10 K by time-of-flight neutron powder diffraction data using the Rietveld method. These compounds behave as Curie-Weiss paramagnets at high temperatures have been determined from the low-temperature neutron data. Although the four magnetic structures are antiferromagnetic, the magnetic couplings in the Mn-O-Mn infinite chains are ferromagnetic in the lithium derivatives and anti-ferromagnetic in the parent materials. These different magnetic behaviors are explained on the basis of subtle differences in the crystal structures after the lithium exchange reaction.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 567614
- Journal Information:
- Journal of Solid State Chemistry, Vol. 132, Issue 1; Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
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