Switching of the Chiral Magnetic Domains in the Hybrid Molecular/Inorganic Multiferroic (ND4 )2 [FeCl5 (D2 O)

Scientific Reports
J Alberto Rodríguez-VelamazánLaurent C Chapon

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.

References

Nov 7, 2003·Nature·T KimuraY Tokura
Jun 29, 2006·Physical Review Letters·Y YamasakiY Tokura
Jan 3, 2007·Nature Materials·Sang-Wook Cheong, Maxim Mostovoy
May 16, 2007·Physical Review Letters·Y YamasakiY Tokura
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Jun 30, 2010·Journal of the American Chemical Society·Guan-Cheng XuSong Gao
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Sep 26, 2012·Physical Review Letters·Alexander J HearmonPaolo G Radaelli
Jul 6, 2014·Reports on Progress in Physics·Yoshinori TokuraNaoto Nagaosa
Sep 30, 2015·Scientific Reports·José Alberto Rodríguez-VelamazánLaurent Chapon

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Citations

Feb 2, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Yolanda NavarroFernando López-Ortiz
Apr 9, 2021·Advanced Materials·Xiao-Lin LiuLan-Sun Zheng

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Methods Mentioned

BETA
neutron diffraction
neutron polarimetry
spherical neutron polarimetry

Software Mentioned

Mag2Pol

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