Magnetic-field-induced change of magnetoelectric coupling in the hybrid multiferroic (ND4)2[FeCl5·D2O]
| Autor: | Oscar Fabelo, Javier Campo, Juan Rodríguez-Carvajal, Laurent Chapon, J. Alberto Rodríguez-Velamazán, Ángel Millán |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed matter physics Spin polarization Magnetic structure Neutron diffraction Inverse 02 engineering and technology 021001 nanoscience & nanotechnology Coupling (probability) 01 natural sciences Magnetic field Magnetization 0103 physical sciences 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Physical Review B. 95 |
| ISSN: | 2469-9969 2469-9950 |
| Popis: | In this paper, we elucidate the changes of magnetoelectric coupling mechanism in different zones of the rich magnetic field-temperature $(B\text{\ensuremath{-}}T)$ phase diagram of the molecular multiferroic ${(\mathrm{N}{\mathrm{H}}_{4})}_{2}[\mathrm{FeC}{\mathrm{l}}_{5}\ifmmode\cdot\else\textperiodcentered\fi{}{\mathrm{H}}_{2}\mathrm{O}]$, which represents one of the rare cases where improper ferroelectricity has been observed in a hybrid material. We have recently proposed a mechanism of multiferroicity in zero magnetic field in the deuterated form of this material from a detailed determination of its crystal and magnetic structures. The proposed magnetic structure at zero magnetic field corresponds to a cycloidal spin arrangement that gives rise to a ferroelectric polarization through the spin current mechanism induced via the inverse Dzyaloshinskii-Moriya interaction. In this paper, we present a single-crystal neutron diffraction study under external magnetic field, aimed at elucidating the evolution of the magnetic structure under applied magnetic field, and determine the mechanism of magnetoelectric coupling, which allows us to describe an unprecedented change from spin current to spin-dependent $p\text{\ensuremath{-}}d$ hybridization mechanism. |
| Databáze: | OpenAIRE |
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