Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Joule-Thomson Effect01:21

Joule-Thomson Effect

11.6K
The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
11.6K
Magnetic Damping01:17

Magnetic Damping

1.3K
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...
1.3K
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

6.6K
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
6.6K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

892
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...
892
Ferromagnetism01:31

Ferromagnetism

3.6K
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...
3.6K
Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

4.7K
Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
4.7K

You might also read

Related Articles

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

Sort by
Same author

Photovoltaic amorphous feroxyhyte nanostructures synthesized by atmospheric AC microplasma.

Nanotechnology·2023
Same author

Printing Air-Stable High-<i>T</i><sub>c</sub> Molecular Magnet with Tunable Magnetic Interaction.

Nano letters·2022
Same author

Tunable electroresistance and electro-optic effects of transparent molecular ferroelectrics.

Science advances·2017
Same author

Unique magnetostriction of Fe<sub>68.8</sub>Pd<sub>31.2</sub> attributable to twinning.

Scientific reports·2016
Same author

Addendum: Non-Joulian magnetostriction.

Nature·2016
Same author

Multifunctional Charge-Transfer Single Crystals through Supramolecular Assembly.

Advanced materials (Deerfield Beach, Fla.)·2016

Related Experiment Video

Updated: Apr 12, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

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

Published on: November 21, 2019

7.8K

Non-Joulian magnetostriction.

Harsh Deep Chopra1, Manfred Wuttig2

  • 1Materials Genomics Laboratory, Laboratory for Quantum Materials &Devices, Mechanical Engineering Department, and Temple Materials Institute, Temple University, Philadelphia, Pennsylvania 19122, USA.

Nature
|May 22, 2015
PubMed
Summary

Scientists discovered giant non-Joulian magnetostriction (NJM), a new magnetic effect in materials. This phenomenon, unlike traditional Joule magnetostriction, offers enhanced material properties and potential for novel applications.

More Related Videos

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.1K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

3.0K

Related Experiment Videos

Last Updated: Apr 12, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

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

Published on: November 21, 2019

7.8K
Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.1K
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
08:50

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

3.0K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Magnetism

Background:

  • Joule magnetostriction, characterized by volume conservation, describes anisotropic elongation/contraction of magnets in a magnetic field.
  • This effect is linked to magnetization rotation and domain self-accommodation in functional materials.
  • Existing models struggle to explain certain properties of advanced magnetic alloys.

Purpose of the Study:

  • To report the discovery of a new type of magnetostriction: non-Joulian magnetostriction (NJM).
  • To elucidate the mechanism behind NJM and its implications for material properties.
  • To identify new classes of materials exhibiting NJM and explore their potential applications.

Main Methods:

  • Investigated the microstructural and magnetic properties of specific Fe-based alloys.
  • Analyzed the relationship between material structure, magnetization, and strain.
  • Proposed a theoretical framework based on micro-'cell' reorientation and elastic gradients.

Main Results:

  • Discovered 'giant' non-volume-conserving or non-Joulian magnetostriction (NJM).
  • NJM arises from the reorientation of self-sufficient micro-'cells', not magnetization rotation.
  • Identified Fe-based alloys with specific thermal histories as exhibiting NJM.
  • Observed non-dissipative, linearly reversible, and isotropic magnetization curves.

Conclusions:

  • NJM represents a new paradigm in magnetostriction, distinct from Joule magnetostriction.
  • The adaptive cellular structure is key to NJM and its associated material properties.
  • NJM offers pathways for developing new highly magnetostrictive materials with simultaneous large longitudinal and transverse actuation.