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The Weiss molecular field and the local molecular field; Le champ moleculaire de Weiss et le champ moleculaire local

Abstract

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) [French] 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  More>>
Authors:
Neel, L; [1]  Faculte des Sciences de Grenoble, 38 (France)]
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1959
Product Type:
Technical Report
Report Number:
CEA-R-1096
Resource Relation:
Conference: 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; Other Information: 42 refs
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIFERROMAGNETIC MATERIALS; CURIE POINT; CURIE-WEISS LAW; FERRITES; FERROMAGNETIC MATERIALS; LANDAU FLUCTUATIONS; LANGEVIN EQUATION; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; ORTHORHOMBIC LATTICES; PYRRHOTITE; TEMPERATURE DEPENDENCE
OSTI ID:
20912771
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France); Centre Nationale de la Recherche Scientifique, 75 - Paris (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR07R1096073947
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
24 pages
Announcement Date:
Sep 24, 2007

Citation Formats

Neel, L, and Faculte des Sciences de Grenoble, 38 (France)]. The Weiss molecular field and the local molecular field; Le champ moleculaire de Weiss et le champ moleculaire local. France: N. p., 1959. Web.
Neel, L, & Faculte des Sciences de Grenoble, 38 (France)]. The Weiss molecular field and the local molecular field; Le champ moleculaire de Weiss et le champ moleculaire local. France.
Neel, L, and Faculte des Sciences de Grenoble, 38 (France)]. 1959. "The Weiss molecular field and the local molecular field; Le champ moleculaire de Weiss et le champ moleculaire local." France.
@misc{etde_20912771,
title = {The Weiss molecular field and the local molecular field; Le champ moleculaire de Weiss et le champ moleculaire local}
author = {Neel, L, and Faculte des Sciences de Grenoble, 38 (France)]}
abstractNote = {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) [French] 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)}
place = {France}
year = {1959}
month = {Jul}
}