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Magnetostatic Boundary Conditions

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...

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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

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Published on: August 15, 2018

Multilayer Ceramic Magnetoelectric Composites with Tailored Interfaces for Enhanced Response.

Harvey Amorín¹, Jesús Ricote¹, Iván San-Felipe¹

¹Instituto de Ciencia de Materiales de Madrid, CSIC , Cantoblanco, 28049 Madrid, Spain.

ACS Applied Materials & Interfaces

|October 17, 2017

Summary

This study investigates interfaces in multilayer ceramic composites, revealing that tailored microstructures and controlled sintering improve interface quality and magnetoelectric response for advanced technologies.

Keywords:

ceramic composites magnetoelectrics multiferroics piezoresponse force microscopy spark plasma sintering

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Multiferroic composite materials offer alternatives to single-phase multiferroics for magnetoelectric applications.
Strain-mediated magnetoelectric coupling in composites heavily relies on the interface quality between ferroic phases.
Cofired ceramic composites are promising for reliability and miniaturization but often exhibit poor reproducibility linked to interfaces.

Purpose of the Study:

To investigate the local material properties across interfaces in 0.36BiScO3-0.64PbTiO3/NiFe2O4 multilayer ceramic composites.
To establish experimental evidence correlating interface quality with magnetoelectric response reproducibility.
To optimize composite processing for enhanced functional interfaces and improved magnetoelectric performance.

Main Methods:

Fabrication of multilayer ceramic composites using spark plasma sintering of nanocrystalline powders.
In-depth characterization of local material properties at the interfaces between ferroic phases.
Adjustment of sintering parameters to control mismatch between ferroic phases and tailor microstructure.

Main Results:

Achieved tailored microstructures and low residual stress levels by optimizing sintering mismatch.
Demonstrated fully functional interfaces with enhanced magnetoelectric responses in the composite materials.
Provided experimental support for the critical role of interface quality in magnetoelectric performance.

Conclusions:

Controlling the interface quality through optimized processing is crucial for reproducible and enhanced magnetoelectric responses in ceramic composites.
The developed processing route offers a pathway for reliable and high-performance magnetoelectric devices.
This work advances the understanding and application of advanced composite materials in magnetoelectric technologies.