Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Potential Due to a Magnetized Object

Potential Due to a Magnetized Object

Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...

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...

Diamagnetism

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.

Magnetic Damping

Magnetic Damping

Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...

Magnetic Field Of A Current Loop

Magnetic Field Of A Current Loop

Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.

Magnetic Susceptibility and Permeability

Magnetic Susceptibility and Permeability

In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Gecko-Like Multi-Directional High-Power Magneto-Mechano-Electric Energy Harvesters for Self-Powered, Hundred-Meter-Scale LoRa Communication.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026

Same author

Dual-Piezo-Charge Strategy in (1-0)-3 Single-Crystal Composite for Enhancing Underwater Acoustic Sensing.

Nano-micro letters·2026

Same author

A High-Temperature Piezoelectric Accelerometer Operating in Symmetric Shear-Bending Coupling Mode.

ACS applied materials & interfaces·2026

Same author

Engineered Interfacial Electron Barriers for Superior High-Temperature Energy Storage in All-Polymer Dielectrics.

The journal of physical chemistry letters·2025

Same author

A flexible, magnet-based miniaturized mechanical antenna enabling low-frequency cross-medium communication between unmanned systems.

Communications engineering·2025

Same author

Maximizing Power Density and Lifespan of Magneto-Mechano-Electric Generator via Optimizing the Selection of Piezoelectric Ceramic Plate.

Small (Weinheim an der Bergstrasse, Germany)·2025

Search research articles

Related Experiment Video

Updated: Jun 15, 2026

Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes

Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes

Published on: May 17, 2018

Annular bilayer magnetoelectric composites: theoretical analysis.

Mingsen Guo¹, Shuxiang Dong

¹Department of Advanced Materials & Nanotechnology, College of Engineering, Peking University, Beijing, China.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 25, 2010

Summary

This study introduces an annular bilayer magnetoelectric composite for enhanced magnetic field detection. The novel design shows potential for improved magnetoelectric coefficients and broader magnetic field response.

More Related Videos

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

Related Experiment Videos

Last Updated: Jun 15, 2026

Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes

Magnet Assisted Composite Manufacturing: A Flexible New Technique for Achieving High Consolidation Pressure in Vacuum Bag/Lay-Up Processes

Published on: May 17, 2018

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Fabrication of Magnetic Platforms for Micron-Scale Organization of Interconnected Neurons

Published on: July 14, 2021

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Bilayer magnetoelectric (ME) composites leverage magnetostrictive and piezoelectric materials for high ME coefficients, particularly in bending modes.
Previous research utilized equivalent circuit models for bar-shaped bilayer composites.
The need for novel geometries to enhance ME properties and magnetic field sensitivity is recognized.

Purpose of the Study:

To propose and investigate an annular bilayer magnetoelectric composite.
To explore its potential for responding to both vortex and unidirectional magnetic fields.
To predict the magnetoelectric coefficients based on geometric parameters using the impedance-matrix method.

Main Methods:

Development of an annular bilayer composite structure with magnetostrictive and piezoelectric rings.
Utilizing the impedance-matrix method for theoretical analysis.
Investigating the resonance frequencies of bending and radial modes.
Predicting magnetoelectric coefficients as a function of geometric parameters.

Main Results:

The annular composite exhibits a significantly lower resonance frequency in bending mode compared to its radial mode.
The proposed structure is expected to be sensitive to both vortex and unidirectional magnetic fields.
The impedance-matrix method allows for the prediction of ME coefficients based on geometry.

Conclusions:

The annular bilayer magnetoelectric composite offers a promising platform for enhanced magnetoelectric effects.
Its unique geometry provides a lower bending mode resonance frequency and broader magnetic field sensitivity.
Further investigation into geometric parameter optimization can lead to improved device performance.