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Switching of the chiral magnetic domains in the hybrid molecular/inorganic multiferroic (ND4)2[FeCl5(D2O)]

DOI: 10.1038/s41598-018-28883-z DOI Help

Authors: J. Alberto Rodríguez-velamazán (Institut Laue-Langevin) , Oscar Fabelo (Institut Laue-Langevin) , Javier Campo (Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza) , Juan Rodríguez-carvajal (Institut Laue-Langevin) , Navid Qureshi (Institut Laue-Langevin) , Laurent Chapon (Institut Laue-Langevin; Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scientific Reports , VOL 8

State: Published (Approved)
Published: July 2018

Open Access Open Access

Abstract: (ND4)2[FeCl5(D2O)] represents a promising example of the hybrid molecular/inorganic approach to create materials with strong magneto-electric coupling. Neutron spherical polarimetry, which is directly sensitive to the absolute magnetic configuration and domain population, has been used in this work to unambiguously prove the multiferroicity of this material. We demonstrate that the application of an electric field upon cooling results in the stabilization of a single-cycloidal magnetic domain below 6.9 K, while poling in the opposite electric field direction produces the full population of the domain with opposite magnetic chirality. We prove the complete switchability of the magnetic domains at low temperature by the applied electric field, which constitutes a direct proof of the strong magnetoelectric coupling. Additionally, we refine the magnetic structure of the ordered ground state, deducing the underlying magnetic space group consistent with the direction of the ferroelectric polarization, and we provide evidence of a collinear amplitude-modulated state with magnetic moments along the a-axis in the temperature region between 6.9 and 7.2 K.

Journal Keywords: Ferroelectrics and multiferroics; Magnetic properties and materials

Subject Areas: Materials, Physics

Facility: Institut Laue-Langevin

Documents:
s41598-018-28883-z.pdf