We report on magnetic studies of the double perovskite Ca 2FeMoO6 in its paramagnetic state. It is found that the effective magnetic moment, extracted from the Curie constant, is magnetic field dependent and it is smaller than that expected in a simple ionic scenario. These experimental results, which are in agreement with early reports on Sr 2FeMoO6, are interpreted as a direct evidence of the antiferromagnetic coupling and polarization of the conduction band in these oxides. A simple mean field model accounts for these observations and enlightens the relevance of itinerant carriers on the strength of the magnetic coupling in these oxides. © 2005 Elsevier B.V. All rights reserved.
|Journal||Materials Science and Engineering B: Solid-State Materials for Advanced Technology|
|Publication status||Published - 25 Jan 2006|
- Antiferromagnetic coupling
- Ca FeMoO 2 6