Magnetoelectric coupling in multiferroic CFO/BCTSn core shell nanofibers elaborated by co-axial electrospinning method

TL;DR

This paper reports the synthesis and characterization of multiferroic core-shell nanofibers with strong magnetoelectric coupling, demonstrating their potential for magnetic sensors and devices.

Contribution

It introduces a co-axial electrospinning method to create multiferroic CFO/BCTSn nanofibers with confirmed core-shell structure and high magnetoelectric response.

Findings

Maximum ME coefficient of 346 mV cm-1 Oe-1 achieved

Successful synthesis of core-shell nanofibers with distinct structures

High magnetoelectric coupling indicates potential for sensor applications

Abstract

Multiferroic CoFe2O4-Ba0.95Ca0.05Ti0.89Sn0.11O3 core-shell nanofibers (CFO@BCTSn NFs) were synthesized by a sol-gel co-axial electrospinning technique. The scanning electron microscope and transmission electron microscope were used to check nanofibers' core-shell structure/configuration. X-ray diffraction and a high-resolution transmission electron microscope were used to confirm the spinel structure of CFO and the perovskite structure of BCTSn. The magnetic character of the resultant CFO@BCTSn NFs was determined by SQUID magnetometry. The piezoelectricity was verified using piezo-response force microscopy, which revealed an entirely covered ferroelectric shell outline, in accordance with SEM and TEM observations. The magnetoelectric (ME) coefficient was measured as a function of the applied external DC magnetic field. The maximum ME coefficient obtained for the CFO@BCTSn NFs was 346 mV cm-1 Oe-1. The high magnetoelectric coupling suggests that CFO@BCTSn NFs could be a promising candidate for magnetic field sensor and magnetoelectric device applications.