J. Phys. IV France 07 (1997) C1-569-C1-572
Analysis of Magnetite and related Ferrites by Means of Magnetic After-Effect-SpectraF. Walz1, V.A.M. Brabers2 and H. Kronmüller1
1 MPI für Metallforschung, Institut für Physik, Heisenbergstr. 1, 70569 Stuttgart, Germany
2 Technische Universiteit Eindhoven, Postbus 513, 5600 MB Eindhoven, Netherlands
The magnetic aftereffect (MAE) spectra of magnetite (Fe3O4) and related spinel ferrites react most sensibly on smallest deviations of the crystal stoichiometry due to intrinsic or extrinsic lattice defects. Thus, the analysis of corresponding MAE spectra represents both an effective tool for quality control and classification of these materials and, moreover, a high-sensitive instrument for the detection and identification of respective lattice defects. The efficiency of this technique is demonstrated in the following on a series of instructive examples.
© EDP Sciences 1997