Epitaxial self-organization: from surfaces to magnetic materials

Olivier Fruchart

doi:10.1016/j.crhy.2004.11.007

Epitaxial self-organization: from surfaces to magnetic materials
[Auto-organisation épitaxiale : des surfaces aux matériaux magnétiques]

Présenté par : Guy Laval

Olivier Fruchart ¹

¹ Laboratoire Louis Néel (CNRS), 25, avenue des Martyrs, BP166, 38042 Grenoble cedex 9, France

Comptes Rendus. Physique, Volume 6 (2005) no. 1, pp. 61-73.

Résumé
Abstract

Alors que l'auto-organisation est un domaine maintenant consacré pour les semi-conducteurs, il est en émergence pour les matériaux magnétiques, avec une activité soutenue les cinq dernières années. Un panorama des contributions de l'auto-organisation au magnétisme est proposé ici, avec pour but de montrer les possibilités nouvelles offertes, notamment par rapport à la lithographie. Une première catégorie d'études concerne la mesure et la compréhension de phénomènes magnétiques en basse dimensionnalité, qui existent dans les matériaux applicatifs mais ne peuvent y être étudiés quantitativement du fait de leur complexité : mise en ordre magnétique, anisotropie magnétique, superparamagnétisme. Une seconde catégorie concerne la perspective de l'utilisation directe de systèmes auto-organisés. Des exemples sont donnés pour combattre le superparamagnétisme en fabriquant des structures auto-organisées épaisses, ou établir des fonctionnalités nouvelles, notamment le contrôle de l'anisotropie et de la dispersion de propriétés.

Self-organization of magnetic materials is an emerging and active field. An overview of the use of self-organization for magnetic purposes is given, with a view to illustrate aspects that cannot be covered by lithography. A first set of issues concerns the quantitative study of low-dimensional magnetic phenomena (1D and 0D). Such effects also occur in microstructured and lithographically-patterned materials but cannot be studied in these because of the complexity of such materials. This includes magnetic ordering, magnetic anisotropy and superparamagnetism. A second set of issues concerns the possibility to directly use self-organization in devices. Two sets of examples are given: first, how superparamagnetism can be fought by fabricating thick self-organized structures, and second, what new or improved functionalities can be expected from self-organized magnetic systems, like the tailoring of magnetic anisotropy or controlled dispersion of properties.

Publié le : 2005-01-01

DOI : 10.1016/j.crhy.2004.11.007

Keywords: Self-organization, Self-assembly, Magnetism, Magnetic anisotropy, Micromagnetism, Superparamagnetism
Mot clés : Auto-organisation, Auto-assemblage, Magnétisme, Anisotropie magnétique, Micromagnétisme, Superparamagnétisme

Affiliations des auteurs :

Olivier Fruchart ¹

¹ Laboratoire Louis Néel (CNRS), 25, avenue des Martyrs, BP166, 38042 Grenoble cedex 9, France

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Olivier Fruchart. Epitaxial self-organization: from surfaces to magnetic materials. Comptes Rendus. Physique, Volume 6 (2005) no. 1, pp. 61-73. doi : 10.1016/j.crhy.2004.11.007. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.11.007/

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