Artificial multiferroic heterostructures for an electric control of magnetic properties

Vincent Garcia; Manuel Bibes; Agnès Barthélémy

doi:10.1016/j.crhy.2015.01.007

Artificial multiferroic heterostructures for an electric control of magnetic properties

Vincent Garcia ¹; Manuel Bibes ¹; Agnès Barthélémy ¹

¹ Unité mixte de physique CNRS/Thales, campus de l'École polytechnique, 1, avenue Augustin-Fresnel, 91767 Palaiseau, France

Comptes Rendus. Physique, Multiferroic materials and heterostructures / Matériaux et hétérostructures multiferroïques, Volume 16 (2015) no. 2, pp. 168-181.

Abstract
Résumé

The control of magnetism by electric fields is an important goal for future low-power spintronics devices. This partly explains the intensified recent interest for magnetoelectric multiferroic materials and heterostructures. The lack of ferro- or ferrimagnetic–ferroelectric materials with large magnetoelectric coupling between the two orders has spurred intensive research on artificial multiferroics combining ferroelectric or piezoelectric materials and ferromagnets. In this paper we review synthetically the potential of thin-film-based heterostructures in which a magnetic film is in contact with a ferroelectric or piezoelectric one to obtain an electric control of magnetic properties. This electric control either results from a strain-induced magnetoelectric coupling, a charge-driven one, or from the modulation of an interfacial exchange-bias interaction.

Contrôler électriquement les propriétés magnétiques des matériaux et réaliser ainsi de nouveaux composants faiblement consommateurs en énergie est un des enjeux de la future électronique de spin. Ceci explique l'intérêt considérable porté aux matériaux et architectures multiferroïques. Malgré des recherches intenses, le graal d'un composé à la fois ferroélectrique et ferro- ou ferrimagnétique à température ambiante avec un fort couplage magnétoélectrique entre ces deux propriétés n'a pas encore été trouvé. Pour pallier ce manque, de nombreux travaux ont porté sur les multiferroïques artificiels, hétérostructures combinant un matériau ferroélectrique ou piézoélectrique et un composé ferromagnétique. Cet article constitue une revue succincte du potentiel de ces hétérostructures en géométrie planaire pour obtenir un contrôle électrique des propriétés magnétiques. Un tel contrôle peut être obtenu par un effet magnétoélectrique indirect basé sur un couplage d'origine élastique, de façon directe par une modulation des charges dans le ferromagnétique induite par la ferroélectricité ou encore en exploitant le couplage d'échange à l'interface entre un multiferroïque et un matériau magnétique.

Published online: 2015-02-19

DOI: 10.1016/j.crhy.2015.01.007

Keywords: Multiferroics, Heterostructures, Magnetoelectric coupling, Interfaces, Spintronics, Ferroelectrics
Mots-clés : Multiferroïques, Hétérostructures, Couplage magnétoélectrique, Interfaces, Spintronique, Ferroélectriques

Author's affiliations:

Vincent Garcia ¹; Manuel Bibes ¹; Agnès Barthélémy ¹

¹ Unité mixte de physique CNRS/Thales, campus de l'École polytechnique, 1, avenue Augustin-Fresnel, 91767 Palaiseau, France

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Vincent Garcia; Manuel Bibes; Agnès Barthélémy. Artificial multiferroic heterostructures for an electric control of magnetic properties. Comptes Rendus. Physique, Multiferroic materials and heterostructures / Matériaux et hétérostructures multiferroïques, Volume 16 (2015) no. 2, pp. 168-181. doi : 10.1016/j.crhy.2015.01.007. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2015.01.007/

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