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

Scaling

Scaling

In designing and analyzing filters, resonant circuits, or circuit analysis at large, working with standard element values like 1 ohm, 1 henry, or 1 farad can be convenient before scaling these values to more realistic figures. This approach is widely utilized by not employing realistic element values in numerous examples and problems; it simplifies mastering circuit analysis through convenient component values. The complexity of calculations is thereby reduced, with the understanding that...

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 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...

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.

Atomic Nuclei: Larmor Precession Frequency

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession,...

Potential Due to a Magnetized Object

Potential Due to a Magnetized Object

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...

You might also read

Related Articles

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

Sort by

Same author

Optimisation of the crystallisation process through staggered cooling in a nonvibrating granular system.

Scientific reports·2025

Same author

Two-step crystallisation in a 2D active magnetic granular system confined by a parabolic potential.

Scientific reports·2023

Same author

Magnetized granular particles running and tumbling on the circle S^{1}.

Physical review. E·2023

Same author

Differentiating acute from chronic insomnia with machine learning from actigraphy time series data.

Frontiers in network physiology·2023

Same author

Direct observation of crystal nucleation and growth in a quasi-two-dimensional nonvibrating granular system.

Physical review. E·2021

Same author

Crystallisation in a two-dimensional granular system at constant temperature.

Scientific reports·2021

Search research articles

Related Experiment Video

Updated: Dec 15, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

Scale invariance in a nonvibrating magnetic granular system.

G Torres-Vargas^1,2, R Fossion^3,4, F Donado¹

¹Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, 42184, Hidalgo, Mexico.

Scientific Reports

|July 12, 2020

Summary

This study explores a magnetic granular system, revealing fractal and scale-invariant dynamics. Increasing magnetic field strength enhances particle correlations, creating a model for correlated random walks.

More Related Videos

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Related Experiment Videos

Last Updated: Dec 15, 2025

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Area of Science:

Physics
Complex Systems
Nonlinear Dynamics

Background:

Granular systems exhibit complex behaviors influenced by external forces.
Understanding particle dynamics is crucial for modeling emergent phenomena.

Purpose of the Study:

To investigate the dynamics of a nonvibrating magnetic granular system.
To characterize particle correlations and scale invariance under varying magnetic fields.

Main Methods:

Time series analysis of particle positions in the x-direction.
Fourier spectral analysis to identify power-law scaling.
Detrended fluctuation analysis (DFA) for confirmation.

Main Results:

The system exhibits fractal and scale-invariant time series.
Fourier power spectra follow a power law, indicating strong correlations.
Correlation strength increases with magnetic field amplitude.
A constant magnetic field disrupts scale invariance.

Conclusions:

The magnetic granular system serves as an experimental model for generating correlated random walks.
Magnetic field strength is a key parameter controlling system dynamics and correlations.
Scale invariance is a tunable property in this granular system.