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arXiv · 2307.06034

Temperature dependent magnetoelectric response of lead-free Na$_{0.4}$K$_{0.1}$Bi$_{0.5}$TiO$_3$-NiFe$_2$O$_4$ laminated composites

Adityanarayan Pandey·Amritesh Kumar·Pravin Varade·K. Miriyala·A. Arockiarajan·Ajit. R. Kulkarni·N. Venkataramani
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Abstract

This study investigates the temperature-dependent quasi-static magnetoelectric (ME) response of electrically poled lead-free Na$_{0.4}$K$_{0.1}$Bi$_{0.5}$TiO$_3$-NiFe$_2$O$_4$ (NKBT-NFO) laminated composites. The aim is to understand the temperature stability of ME-based sensors and devices. The relaxor ferroelectric nature of NKBT is confirmed through impedance and polarization-electric (PE) hysteresis loop studies, with a depolarization temperature (Td) of approximately 110$^\circ$C. Heating causes a decrease and disappearance of planar electromechanical coupling, charge coefficient, and remnant polarization above Td. The temperature rise also leads to a reduction in magnetostriction and magnetostriction coefficient of NFO by approximately 33% and 25%, respectively, up to approximately 125$^\circ$C. At room temperature, the bilayer and trilayer configurations exhibit maximum ME responses of approximately 33 mV/cm.Oe and 80 mV/cm.Oe, respectively, under low magnetic field conditions (300-450 Oe). The ME response of NKBT/NFO is highly sensitive to temperature, decreasing with heating in accordance with the individual temperature-dependent properties of NKBT and NFO. This study demonstrates a temperature window for the effective utilization of NKBT-NFO-based laminated composite ME devices.

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Adityanarayan Pandey, Amritesh Kumar, Pravin Varade, K. Miriyala, A. Arockiarajan, Ajit. R. Kulkarni, N. Venkataramani. 2023-07-12. Temperature dependent magnetoelectric response of lead-free Na$_{0.4}$K$_{0.1}$Bi$_{0.5}$TiO$_3$-NiFe$_2$O$_4$ laminated composites. https://arxiv.org/abs/2307.06034

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