Main Characteristics of Piezo-Magnetization and Their Qualitative Interpretation
1966; Society of Geomagnetism and Earth, Planetary and Space Sciences; Volume: 18; Issue: 1 Linguagem: Inglês
10.5636/jgg.18.81
ISSN2185-5765
Autores Tópico(s)Magnetic and Electromagnetic Effects
ResumoMajor characteristics of observed effects of uniaxial compression upon magnetization of rocks and assemblages of magnetic minerals are summarized as follows: -(a) uniaxial compression in a magnetic field results in a decrease of magnetization; (b) removal of the magnetic field in presence of the compession causes a decrease of remanence; (c) removal of the compression in presence of the magnetic field causes an increase of magnetization and also an increase of remanence after the magnetic field is taken off. Typical examples of experimental results are shown in Figures 2 and 3.These observed characteristics are interpreted satisfactorily as due to an effect of increased magnetoelastic energy upon irreversible magnetization by a comparatively simple theory based on a model of an assemblage of single domains having uniaxial anisotropy, where the anisotropy energy, K, is subject to a certain distribution function n(2K/Js) with a condition dn/dK≥0.
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