Tuning the ferroelectric state in multiferroic TbMnO3 single crystal by a trapped-charge-induced internal electric field

Tao Zou, Zhiling Dun, Huibo Cao, Mengze Zhu, Haidong Zhou, Xianglin Ke

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Abstract

The pyroelectric current effects in multiferroic TbMnO3 single crystal are reinvestigated in a wide temperature range. We report a pyroelectric current peak occurring around T = 107 K, which is much higher than the magnetic phase transition temperatures, after poling the sample from T ≥ 60 K to low temperatures, and we attribute it to the thermal release of trapped-charges in TbMnO3. We also show that the trapped-charges form a strong internal electric field that remarkably controls the ferroelectric polarization state induced by the cycloidal Mn3+ spins at lower temperature.

Original languageEnglish
Article number104101
JournalJournal of Applied Physics
Volume116
Issue number10
DOIs
StatePublished - Sep 14 2014

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