CHAIX, Laura; BALLOU, Rafik; CANO, Andres; PETIT, Sylvain; DE BRION, Sophie; OLLIVIER, Jacques; REGNAULT, Louis-Pierre; RESSOUCHE, Eric; CONSTABLE, Evan; COLIN, Claire; ZORKO, A.; SCAGNOLI, Valerio; BALAY, Joël; LEJAY, Pascal; SIMONET, Virginie

doi:10.1103/PhysRevB.93.214419

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CHAIX, Laura
Matériaux, Rayonnements, Structure [NEEL - MRS]
Institut Laue-Langevin [ILL]
Standford University

BALLOU, Rafik
Magnétisme et Supraconductivité [NEEL - MagSup]

CANO, Andres
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

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Physical Review B. 2016-06-16, vol. 93, n° 21, p. 214419

American Physical Society

Resumen en inglés

The chiral Fe-based langasites represent model systems of triangle-based frustrated magnets with a strong potential for multiferroicity. We report neutron scattering measurements for the multichiral Ba3MFe3Si2O14 (M = Nb, Ta) langasites revealing new important features of the magnetic order of these systems: the bunching of the helical modulation along the c-axis and the in-plane distortion of the 120° Fe-spin arrangement. We discuss these subtle features in terms of the microscopic spin Hamiltonian, and provide the link to the magnetically-induced electric polarization observed in these systems. Thus, our findings put the multiferroicity of this attractive family of materials on solid ground.< Leer menos

Palabras clave en inglés

neutron scattering

chirality

multiferroic

DOI

http://dx.doi.org/10.1103/PhysRevB.93.214419

Proyecto ANR

Effets magnéto-électriques dynamiques : études expérimentale et théorique des excitations hybrides

Orígen

Importado de Hal

Centros de investigación

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026