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Nonanaliticity of the Magnetization Curve ARTICLE STRUCTURE
Terms in this set (10)
Recent studies made by the present authors on uniaxial materials have shown the presence of a singularityin the magnetization curve of a polycrystalline sample.
...but we cannot be sure there will be the same behavior for the successive derivatives of 1lf with respect to H, i.e., dM/dH, d'M/dH', etc.
Ia. The Problem
According to our theory the position of the singularity must be independent of the distribution in size and orientation of the crystallites,
Ib.The hypothesis [haɪ'pɔθəsɪs] (advanced)
We have carried out measurements by the pulsed-magnetic-field technique on the two series of hexagonal compounds, ...
The detection of singularities in the magnetization curve can be considered a new method to measure the anisotropy field in polycrystalline samples.
In order to test the role of grain interactions on the shape and position of the singularity, we have taken measurements on powdered samples
III. EXPERIMENTAL PROCEDURE (Explanation of experimental and analytical procedures)
This result is in agreement with the curves we have obtained... Similarly, our results show that the position of the peak is not affected by the degree of orientation of the crystallites in the sample.
The model discussed here is a good approximation for hard magnetic materials, but as ...
A case in which this method is particularly suitable is that of materials with noncollinear spin order: It allows one to separate the anisotropy from the exchange contribution to the differential susceptibility at high fields.
The authors wish to thank Dr. G. Fiorio for many helpful comments
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