Multiferroicity around Verwey transition in Fe3O4 thin films | Zendy

Shubhankar Mishra | Zendy; K. Dey | Zendy; Ujjal Chowdhury | Zendy; Dipten Bhattacharya | Zendy; Chandan Kumar Ghosh | Zendy; S. Giri | Zendy

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Multiferroicity around Verwey transition in Fe3O4 thin films

Author(s) -

Shubhankar Mishra,

K. Dey,

Ujjal Chowdhury,

Dipten Bhattacharya,

Chandan Kumar Ghosh,

S. Giri

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.5011119

Subject(s) - ferroelectricity , polarization (electrochemistry) , condensed matter physics , materials science , charge ordering , thin film , multiferroics , optoelectronics , nanotechnology , physics , chemistry , charge (physics) , dielectric , quantum mechanics

We report observation of finite remanent polarization (∼10-80 nC/cm2) and reasonably strong magnetoelectric coupling in thin film of Fe3O4 within a temperature range from ∼40 K to Verwey transition temperature TCO ∼120 K. Both the intrinsic capacitance and remanent ferroelectric polarization decrease by ∼20-60% under 0-50 kOe field within this temperature range. The measurements using conventional techniques do not yield convincing results as the ferroelectric polarization is small and loss is large. However, use of more sophisticated protocol - which eliminates the contribution from loss and nonhysteretic polarization effectively - provides reliable information about remanent polarization and its change under magnetic field around the Verwey transition

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