Summary
Characteristics of the piezo-remanent magnetization (PRM) of lunar rocks are particularly interesting in comparison with the PRM of terrestrial rocks, because ferromagnetic constituents in lunar materials are metallic iron grains whose average magnetostriction coefficient\((\bar \lambda )\) is negative. Experimentally observed characteristics of the PRM of lunar rocks are substantially the same as those of the PRM of terrestrial rocks and magnetites, in which\(\bar \lambda \) is positive. These experimental results indicate that the acquisition mechanism of PRM is due to a non-linear superposition of the magnetoelastic pressure upon the magnetostatic pressure on both sides of the 90° domain walls in ferromagnetic particles, as suggested by Nagata and Carleton.
Zusammenfassung
Die Eigenschaften der piezo-remanenten Magnetisierung (PRM) der Mondgesteine sind besonders interessant im Vergleich mit der PRM der Erdgesteine, weil die ferromagnetischen Bestandteile der Mondmaterien die metallischen Eisenkörnchen sind, derer durchschnittliche Magnetostriktion-Koeffizient\((\bar \lambda )\) negativ ist. Die experimentelle gemessenen Eigenschaften von PRM der Mondgesteine sind wesentlich dieselbe der Erdgesteine und Magnetite, derer\(\bar \lambda \) positive ist. Solche experimentaren Ergebnisse zeigen an, dass die Erwerbung von PRM durch eine nonlineare Übereinanderwirkung des magnetoelastischen Druckes und des magnetostatischen Druckes gegen die beiden Seiten der 90° Gebietwände der ferromagnetischen Teilchen ist, wie Nagata und Carleton vorgeschlagen haben.
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References
R. M. Bozorth,Ferromagnetism (Van Nostrand 1951), pp. 1–968.
D. J. Dunlop, M. Ozima andH. Kinoshita,Piezomagnetization of single-domain grains, a graphical approach, J. Geomag. Geoele.21 (1969), 513–518.
H. Kinoshita,Studies on piezo-magnetization (IV) Interpretations of PRM production for single domain grains, J. Geomag. Geoele.21 (1969), 409–426.
T. Nagata,Main characteristics of piezo-magnetization and their qualitative interpretation, J. Geomag. Geoele.18 (1966), 81–97.
T. Nagata andB. J. Carleton,Notes on piezo-remanent magnetization of igneous rocks, J. Geomag. Geoele.20 (1968), 115–127.
T. Nagata andB. J. Carleton,Notes on piezo-remanent magnetization of igneous rocks II, J. Geomag. Geoele.21 (1969a), 427–445.
T. Nagata andB. J. Carleton,Notes on peizo-remanent magnetization of igneous rocks III; Theoretical interpretation of experimental results, J. Geomag. Geoele.21 (1969b), 623–645.
T. Nagata, R. M. Fisher andF. C. Schwerer,Lunar rocks magnetism, The Moon4 (1972a), 160–186.
T. Nagata, R. M. Fisher, F. C. Schwerer, M. D. Fuller andJ. R. Dunn,Summary of rock magnetism of Apollo 15 lunar materials, inThe Apollo 15 Lunar Samples, edited byChambelain andWatkins (1972b), pp. 442–445.
T. Nagata andH. Kinoshita,Studies on piezo-magnetization (I), Magnetization of titanoferous magnetite under uniaxial compression, J. Geomag. Geoele.17 (1965), 121–136.
Y. Syono,Magnetocrystalline anisotropy and magnetostriction of Fe 3O4 −Fe 2 TiO 4 series, Japanese J. Geophys.4 (1965), 71–143.
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Nagata, T. Piezo-remanent magnetization of lunar rocks. PAGEOPH 110, 2022–2030 (1973). https://doi.org/10.1007/BF00876566
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DOI: https://doi.org/10.1007/BF00876566