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

Ferromagnetism

Ferromagnetism

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...

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 Fields

Magnetic Fields

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...

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...

Paramagnetism

Paramagnetism

Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along 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.

You might also read

Related Articles

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

Sort by

Same author

Bound states in the continuum in plasmonic structures.

Reports on progress in physics. Physical Society (Great Britain)·2026

Same author

All-optical tuning of dielectric metasurfaces infiltrated with dye-doped liquid crystals.

Nanoscale·2026

Same author

Helical metasurfaces based on topological surface states in three-dimensional photonic topological insulators.

Nature materials·2026

Same author

Enhanced biochemical sensing with high-Q transmission resonances in free-standing membrane metasurfaces.

Optica·2025

Same author

Topological Photonics on a Small Scale.

Small science·2025

Same author

Non-Hermitian singularities in scattering spectra of Mie resonators.

Science advances·2025

Search research articles

Related Experiment Video

Updated: Jun 27, 2026

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Nonlinear magnetic metamaterials.

Ilya V Shadrivov¹, Alexander B Kozyrev, Daniel W van der Weide

¹Nonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia.

|December 10, 2008

Summary

We experimentally demonstrated nonlinear tunable magnetic metamaterials using varactor diodes. These metamaterials exhibit power-dependent transmission, enabling tunable microwave frequencies and nonlinear wave manipulation.

More Related Videos

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Related Experiment Videos

Last Updated: Jun 27, 2026

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Area of Science:

Condensed Matter Physics
Electromagnetism
Materials Science

Background:

Metamaterials offer unique electromagnetic properties not found in natural materials.
Controlling metamaterial properties dynamically is crucial for advanced applications.
Nonlinear effects in metamaterials can lead to novel functionalities.

Purpose of the Study:

To experimentally investigate nonlinear tunable magnetic metamaterials.
To demonstrate dynamic tuning of magnetic resonance via input power.
To explore power-dependent transmission and nonlinear wave phenomena.

Main Methods:

Fabrication of nonlinear metamaterials using double split-ring resonators.
Integration of varactor diodes for tunable magnetic resonance.
Experimental characterization of transmission properties at varying input powers.

Main Results:

Demonstrated power-dependent transmission in the metamaterial.
Observed a tunable shift in the transmission band with input power.
Showcased nonlinearity-induced enhancement and suppression of wave transmission.

Conclusions:

Nonlinear tunable magnetic metamaterials can be dynamically controlled.
Varactor-loaded metamaterials exhibit significant nonlinear electromagnetic responses.
These findings pave the way for advanced microwave devices with tunable nonlinearities.