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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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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...
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Ferromagnetism01:31

Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

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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...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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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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Magnetic Damping01:17

Magnetic Damping

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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.
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Updated: Feb 27, 2026

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

Yan Zong1, Tian Zheng1, Pedro Martins2

  • 1ARC Centre for Electromaterials Science (ACES), Intelligent Polymer Research Institute/AIIM Faculty, Innovation Campus, Squires Way, University of Wollongong, Wollongong,, NSW 2522, Australia.

Nature Communications
|June 30, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel cellulose-based magnetoelectric composite. This material achieves significant magnetoelectric coefficients, opening new possibilities for renewable biopolymers in advanced electronic devices.

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Area of Science:

  • Materials Science
  • Physics
  • Polymer Science

Background:

  • Magnetoelectric polymer composites are typically based on poly(vinylidene fluoride) due to its piezoelectric properties.
  • Other piezoelectric polymers, like natural biopolymers, offer unique advantages but are underutilized.
  • Magnetoelectric materials convert magnetic input to voltage output, enabling applications in energy harvesting and sensing.

Purpose of the Study:

  • To demonstrate a novel magnetoelectric laminate composite using cellulose, a renewable biopolymer.
  • To achieve considerable magnetoelectric coefficients using a biopolymer-based material.
  • To explore the potential of biopolymers in magnetoelectric composite applications.

Main Methods:

  • Fabrication of a cellulose-based magnetoelectric laminate composite.
  • Characterization of the composite's magnetoelectric properties.
  • Investigation of underlying physical phenomena, including Fano resonance.

Main Results:

  • The cellulose-based composite achieved magnetoelectric coefficients of approximately 1.5 V cm⁻¹ Oe⁻¹.
  • A Fano resonance, previously unobserved in magnetoelectric composites, was identified.
  • The study validates the use of cellulose as a viable piezoelectric component in magnetoelectric devices.

Conclusions:

  • Cellulose is a promising, sustainable material for high-performance magnetoelectric composites.
  • The observed Fano resonance offers new insights into magnetoelectric phenomena.
  • This work encourages the exploration of biopolymers for advanced magnetoelectric applications.