What is it about?
Magnetoelectricity allows the control of magnetization with an electric field. Nowadays, composite materials of two different ferroics (i.e. a ferroelectric and a ferromagnet) produce large magnetoelectric coefficients to be used in applications. Interfaces between the two components have always been considered to play an important role, but no thorough studies of their nature were performed to determine it. In this study we manage to produce interfaces with different degrees of residual stress and conclude that this stress must be minimized to obtain optimum magnetoelectric responses.
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Why is it important?
As interfaces play a key role in the behavior of magnetoelectric composites, the control of their characteristics through the variation of the stresses developed during cosintering of the two components, means that we are able to produce magnetoelectric materials with enhanced properties.
Perspectives
From the point of view of the local characterization of properties, this work has given me the opportunity of developing the capabilities of the piezoresponse force microscopy, a variation of the scanning force microscopy that allows the study of the piezoelectric properties of the ferroelectric component just next to the interface.
Dr Jesús Ricote
Instituto de Ciencia de Materiales de Madrid. Consejo Superior de Investigaciones Científicas
Read the Original
This page is a summary of: Multilayer Ceramic Magnetoelectric Composites with Tailored Interfaces for Enhanced Response, ACS Applied Materials & Interfaces, October 2017, American Chemical Society (ACS),
DOI: 10.1021/acsami.7b14775.
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