Microscopic mechanisms for phase coexistence and electric polarization enhancement in Mn1−xIrxWO4 + δ

We investigate the magnetic and ferroelectric behaviors of 5d Ir4+ substituted Mn1−xIrxWO4 + δ samples. The electric polarization is enhanced to a certain extent due to the Ir substitution of Mn. Furthermore, the non-polar AF1 phase is partially suppressed by the ferroelectric AF2 phase, resulting i...

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Bibliographic Details
Published in:Journal of applied physics 2020-12, Vol.128 (23)
Main Authors: Yu, H. W., Wang, X. L., Zhang, Q. L., Liu, M. F., Li, L., Xu, Z. C., Yan, Z. B., Liu, S. G.
Format: Article
Language:English
Subjects:
Applied physics
Electric polarization
Ferroelectric materials
Ferroelectricity
Magnetic moments
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Summary:We investigate the magnetic and ferroelectric behaviors of 5d Ir4+ substituted Mn1−xIrxWO4 + δ samples. The electric polarization is enhanced to a certain extent due to the Ir substitution of Mn. Furthermore, the non-polar AF1 phase is partially suppressed by the ferroelectric AF2 phase, resulting in the coexistence of the two phases below TAF1. It is suggested that the lattice distortion, the suppressed magnetic moment, and the increased Dzyaloshinskii–Moriya interaction are the key reasons for the enhanced polarization and the stabilized ferroelectric AF2 phase.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0030256