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AbstractAbstract
[en] Initially, the present report outlines the work done by P. Weiss in the molecular field and spontaneous magnetization theory. It then stresses the success of the theory in the interpretation of the magnetic and energetic properties of ferro-magnetic bodies, and indicates recent progress: 'the energetic molecular field, and the corrective molecular field of the equation of state'. In the second part, the author reviews the difficulties encountered by the theory, and shows how they were overcome by the introduction of the notion of the 'local molecular field', thus supplying the key to the properties of anti-ferro and ferri-magnetic bodies. The present level of progress in the interpretation of the magnetic properties of pyrrhotite, which played a major part in the molecular field discoveries, is also discussed in paragraph 4 and appendices. (author)
[fr]
Dans une premiere partie, l'auteur retrace l'historique des travaux de P. Weiss sur la theorie du champ moleculaire et l'aimantation spontanee; il en souligne les succes dans l'interpretation des proprietes magnetiques et energetiques des corps ferro-magnetiques et les perfectionnements ultimes: champ moleculaire energetique et champ moleculaire correctif de l'equation d'etat. Dans une deuxieme partie, apres avoir examine les difficultes auxquelles se heurtait la theorie, l'auteur montre qu'elles ont ete resolues en introduisant la notion de champ moleculaire local et en donnant ainsi la cle des proprietes des corps antiferro-et ferri-magnetiques. II etudie egalement (paragraphe 4 et Appendice) l'etat actuel de l'interpretation des proprietes magnetiques de la pyrrhotine qui a joue un grand role dans l'histoire du champ moleculaire. (auteur)Original Title
Le champ moleculaire de Weiss et le champ moleculaire local
Primary Subject
Secondary Subject
Source
1959; 24 p; Magnetism National Symposium in commemoration of Pierre Weiss' work; Colloque national de magnetisme. Commemoratif de l'oeuvre de Pierre Weiss; Strasbourg (France); 8-10 Jul 1957; 42 refs.
Record Type
Report
Literature Type
Conference
Report Number
Country of publication
CRYSTAL LATTICES, CRYSTAL STRUCTURE, EQUATIONS, FERRIMAGNETIC MATERIALS, FLUCTUATIONS, IRON COMPOUNDS, MAGNETIC MATERIALS, MAGNETIC PROPERTIES, MATERIALS, MINERALS, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, SULFIDE MINERALS, THERMODYNAMIC PROPERTIES, TRANSITION ELEMENT COMPOUNDS, TRANSITION TEMPERATURE, VARIATIONS
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