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Coupling between an incommensurate antiferromagnetic structure and a soft ferromagnet in the archetype multiferroic BiFeO3/cobalt system

DOI: 10.1103/PhysRevB.91.014402 DOI Help

Authors: Marta Elzo Aizarna (Institut Néel, CNRS et Université Joseph Fourier) , Reda Moubah (CEA Saclay, DSM/IRAMIS/SPEC, URA CNRS 2464) , Camille Blouzon (Synchrotron SOLEIL) , Maurizio Sacchi (Synchrotron SOLEIL) , Stéphane Grenier (Institut Néel, CNRS et Université Joseph Fourier) , Rachid Belkhou (Synchrotron SOLEIL) , Sarnjeet Dhesi (Diamond Light Source) , Dorothée Colson (CEA Saclay, DSM/IRAMIS/SPEC, URA CNRS 2464) , Felipe Torres (Universidad de Chile) , Miguel Kiwi (Universidad de Chile) , Michel Viret (CEA Saclay, DSM/IRAMIS/SPEC, URA CNRS 2464) , Nicolas Jaouen (Synchrotron SOLEIL)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 91 (1)

State: Published (Approved)
Published: January 2015
Diamond Proposal Number(s): 4840

Abstract: Multiferroic materials are mostly antiferromagnets, often containing incommensurate magnetic arrangements stemming from the magnetoelectric interaction. Using soft x-ray resonant magnetic scattering, we show that these long-range structures induce a magnetization wriggle in cobalt layers deposited on top of BiFeO3 single crystals. This is understood using a simple interface exchange interactions model. It leads to the appearance of a magnetic anisotropy axis, which, in the particular BiFeO3/Co system, can be manipulated using an electric field. More generally, it is demonstrated here that through interfacial magnetic exchange, antiferromagnets can leave an imprint revealing some of their hidden properties, thus providing much richer effects than mere exchange bias.

Diamond Keywords: Ferroelectricity; Antiferromagnetism

Subject Areas: Physics, Materials

Instruments: I06-Nanoscience (XPEEM)

Other Facilities: RASOR, RESOXS at SOLEIL

Added On: 26/01/2015 16:32

Discipline Tags:

Quantum Materials Multiferroics Physics Hard condensed matter - structures Magnetism Materials Science

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Magnetic Circular Dichroism (XMCD)