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Coengineering of ferroelectric and exchange bias properties in BiFeO3 based heterostructures

Appl. Phys. Lett. 95, 182503 (2009); doi:10.1063/1.3247893

Published 3 November 2009

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J. Allibe,1 I. C. Infante,1 S. Fusil,1,2 K. Bouzehouane,1 E. Jacquet,1 C. Deranlot,1 M. Bibes,1 and A. Barthélémy1
1Unité Mixte de Physique CNRS/Thales, 1 Av. A. Fresnel, Campus de l'Ecole Polytechnique, 91767 Palaiseau, France and Université Paris-Sud, 91405 Orsay, France
2Université d'Evry-Val d'Essonne, Bd. F. Mitterrand, 91025 Evry Cedex, France

The magnetoelectric coupling existing in some multiferroics may allow the low-power electrical control of spintronics devices. However, room temperature magnetoelectric multiferroics are extremely rare, an exception being BiFeO3, a ferroelectric antiferromagnet. To be used for electrically controllable spintronics, BiFeO3 has to be coupled with a ferromagnetic material through an interfacial exchange interaction, and carefully engineered to show minimum leakage. Here, we propose a Mn doped/undoped bilayer strategy that allows obtaining large exchange bias as well as low leakage. This is an important step toward the manipulation of a magnetization by an electric field in a vertical geometry. ©2009 American Institute of Physics
History: Received 20 July 2009; accepted 15 September 2009; published 3 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/182503/1
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KEYWORDS and PACS

Keywords
PACS
  • 77.80.Dj
    Ferroelectric domain structure; hysteresis
  • 77.22.Ej
    Dielectric polarization and depolarization
  • 75.70.Cn
    Magnetic properties of interfaces
  • 81.15.Fg
    Laser deposition
  • 68.55.Ln
    Thin film defects and impurities
  • 77.55.+f
    Dielectric thin films
  • 77.84.Bw
    Dielectric, piezoelectric, and ferroelectric elements, oxides, nitrides, borides, carbides, chalcogenides, etc
  • 75.80.+q
    Magnetomechanical and magnetoelectric effects, magnetostriction
  • 75.70.Ak
    Magnetic properties of monolayers and thin films
  • 75.60.Ej
    Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.30.Et
    Exchange and superexchange interactions in magnetically ordered materials
  • 75.50.Dd
    Nonmetallic ferromagnetic materials
  • 75.50.Ee
    Antiferromagnetics
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

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