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

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 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...

Atomic Nuclei: Nuclear Relaxation Processes

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis.

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...

Magnetic Field Lines

Magnetic Field Lines

The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:

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...

You might also read

Related Articles

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

Sort by

Same author

Repurposing CRISPR-associated transposases for engineering microbiology.

Trends in biotechnology·2026

Same author

[Recent progress and policy recommendations for biomanufacturing technology in China].

Sheng wu gong cheng xue bao = Chinese journal of biotechnology·2026

Same author

An engineered aryl sulfotransferase for the biosynthesis of glycosaminoglycans.

International journal of biological macromolecules·2026

Same author

EZH2 Regulates the Pluripotency of Mouse Embryonic Stem Cells by Modulating <i>Nanog</i> Expression Under PKC Inhibition.

Biology·2026

Same author

Unveiling Hydrogen Fluoride Emission Mechanisms in Municipal Solid Waste Incineration Using a Machine Learning Approach.

Environmental science & technology·2026

Same author

Structural Engineering of Furazanopyrazine Scaffolds with Flexible Biogenic Amines and Nitramine Moieties for Fused Energetic Melt-Castable Materials.

Organic letters·2026

Search research articles

Related Experiment Video

Updated: Mar 2, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

Instability Pattern Formation in a Liquid Metal under High Magnetic Fields.

Jun Wang¹, Jinshan Li², Hongchao Kou³

¹State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an Shaanxi, 710072, China. nwpuwj@nwpu.edu.cn.

Scientific Reports

|May 24, 2017

Summary

Researchers studied normal field instability in undercooled liquid cobalt near its Curie temperature. They identified critical conditions involving sample size, undercooling, and magnetic field intensity for this unique magnetic fluid behavior.

More Related Videos

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

Related Experiment Videos

Last Updated: Mar 2, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Phase Diagram Characterization Using Magnetic Beads as Liquid Carriers

Published on: September 4, 2015

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

Area of Science:

Materials Science
Magnetohydrodynamics
Thermodynamics

Background:

Magnetic fields can induce interface instabilities in liquids, a phenomenon known as Rosensweig or normal field instability.
Liquid metals, particularly ferromagnetic ones like cobalt, exhibit complex behavior under strong magnetic fields and can be supercooled.

Purpose of the Study:

To investigate the conditions required for observing normal field instability in highly undercooled liquid cobalt near its Curie temperature.
To determine the critical parameters influencing the formation of this unique morphology instability.

Main Methods:

Experimental measurement of liquid cobalt magnetization across a range of temperatures and magnetic field intensities.
Calculation of magnetization as a function of undercooling and field intensity.
Determination of critical size and critical magnetization for normal field instability.

Main Results:

Pure liquid cobalt can be highly undercooled near its Curie temperature in a strong magnetic field, exhibiting normal field instability.
Specific conditions regarding sample size, undercooling, and magnetic field intensity are necessary for this instability to occur.
Critical size and magnetization values for instability were calculated and found to be dependent on temperature and field intensity.

Conclusions:

The study successfully determined the required conditions for normal field instability in undercooled liquid cobalt.
These findings provide insight into the fundamental physics of magnetic fluid interfaces and undercooling phenomena.