Novel Multiferroic Nanocomposite with High Pressure-Modulated Magnetoelectric Coupling

TL;DR

This study presents a novel multiferroic nanocomposite created via high-pressure torsion, exhibiting enhanced magnetic and electrical properties, including colossal polarization increases, suitable for high-pressure sensors and high-speed nanosystems.

Contribution

The paper introduces a new multiferroic nanocomposite synthesized using HPT, demonstrating significant improvements in properties and potential applications in electronics and nanosystems.

Findings

Significant reduction in particle size after HPT.

Colossal increase in residual polarization with pressure.

Enhanced magnetic and electrical properties at room temperature.

Abstract

In this work, we have designed obtained a novel multiferroic nanocomposite using the high-pressure torsion (HPT) method. The crystal structure, phase composition, morphology, ferromagnetic (FM) and ferroelectric (FE) properties of the initial powders and "multiferroic-ferromagnetic" nanocomposites have been studied comprehensively. The initial powders and their composites show the perovskite and spinel crystalline phases for the FE and FM fractions, respectively. After HPT, the particle sizes of the initial powders are decreased significantly. It is shown that the novel nanocomposite consists of exchange-interacting FE and FM phases and demonstrates improved magnetic and electrical properties in low fields at room temperature. A colossal increase in residual polarization with an increase in external high-pressure is found in new composite. The obtained results make it possible to consider the novel nanocomposite as a new functional material for its use both in electronic devices for monitoring ultra-high-pressure and in integrated circuits of high-speed computing nanosystems with low switching energy. The HPT method is a promising method for obtaining new heterophase multiferroic nanosystems.