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Related Concept Videos

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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Magnetostatic Boundary Conditions01:28

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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 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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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.
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...
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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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Magnetic Field Due To A Thin Straight Wire01:28

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Related Experiment Video

Updated: Mar 24, 2026

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

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Interface Magnetoelectric Coupling in Co/Pb(Zr,Ti)O3.

Ondřej Vlašín1, Romain Jarrier1, Rémi Arras2

  • 1Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, CNRS, and Université de Strasbourg , 23 rue du Loess, F-67300 Strasbourg, France.

ACS Applied Materials & Interfaces
|March 5, 2016
PubMed
Summary
This summary is machine-generated.

Researchers explored magnetoelectric coupling at multiferroic interfaces for electric-field control of magnetization. They observed stable interface coupling in Cobalt/Lead Zirconium Titanate (Co/PZT) bilayers, crucial for advanced memory devices.

Keywords:
artificial multiferroicselectro-optic effectinterface-mediated couplingmagneto-optic effectmagnetoelectrics

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Magnetoelectric coupling at multiferroic interfaces offers a pathway for nonvolatile electric-field control of magnetization.
  • Understanding interface coupling mechanisms is key to developing advanced electronic devices.

Purpose of the Study:

  • To investigate static and dynamic interface magnetization variations induced by electric fields in Co/PZT bilayers.
  • To identify and corroborate the magnetoelectric coupling mechanisms at the Co/PZT interface.
  • To assess the stability and frequency response of the interface coupling.

Main Methods:

  • Optical measurements (static and dynamic) to study interface magnetization.
  • Transmission electron microscopy (TEM) for local electronic and magnetic structure analysis.
  • Soft X-ray magnetic circular dichroism (XMCD) and density functional theory (DFT) for mechanism corroboration.

Main Results:

  • A mixed linear and quadratic optical response attributed to a magneto-electro-optical effect was observed.
  • A decomposition method successfully isolated the interface magnetoelectric coupling signal.
  • The interface coupling demonstrated hysteretic behavior, nonzero remanence, and stability over 1-50 kHz without requiring an external magnetic field.

Conclusions:

  • The study confirms the potential of interface magnetoelectric coupling for optimizing magnetoelectric memory devices.
  • The observed coupling offers prospects for enhanced stability, speed, and dissipationless operation in memory applications.
  • Exploiting interface coupling is a promising strategy for next-generation nonvolatile memory technologies.