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

Ferromagnetism01:31

Ferromagnetism

2.4K
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...
2.4K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

1.2K
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...
1.2K
Diamagnetism01:26

Diamagnetism

2.4K
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....
2.4K
Paramagnetism01:30

Paramagnetism

2.5K
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...
2.5K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

311
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...
311
Magnetism01:30

Magnetism

6.4K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
6.4K

You might also read

Related Articles

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

Sort by
Same author

Zirconium Carbide for Hypersonic Applications, Opportunities and Challenges.

Materials (Basel, Switzerland)·2023
Same author

Hybrid Polymer-Garnet Materials for All-Solid-State Energy Storage Devices.

ACS omega·2021
See all related articles

Related Experiment Video

Updated: Jul 15, 2025

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

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

Published on: July 20, 2022

2.8K

Emergent Magnonic Materials: Challenges and Opportunities.

Samanvaya S Gaur1, Ernesto E Marinero1

  • 1School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA.

Materials (Basel, Switzerland)
|September 28, 2023
PubMed
Summary
This summary is machine-generated.

Polycrystalline cobalt-iron alloy films offer a CMOS-compatible path for magnonics, overcoming limitations of yttrium iron garnet. These alloys demonstrate promising spin wave propagation for future dissipationless electronics.

Keywords:
CoFe alloy thin filmsGilbert dampingMgAlFeO spinel ferritesmagnons

More Related Videos

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

8.8K
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
10:36

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

10.6K

Related Experiment Videos

Last Updated: Jul 15, 2025

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

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

Published on: July 20, 2022

2.8K
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

8.8K
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
10:36

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

Published on: January 21, 2016

10.6K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spintronics

Background:

  • Information technology advances are limited by energy dissipation in charge transport.
  • Spin wave (magnon) propagation in magnetic materials offers a dissipationless alternative.
  • Low magnetic damping is crucial for controlling magnon propagation length.

Purpose of the Study:

  • To investigate alternative material systems for magnonics beyond Yttrium Iron Garnet (YIG).
  • To evaluate Cobalt-Iron (CoFe) alloys and Magnesium Aluminum Iron Oxide (MAFO) ferrites as potential magnonic materials.
  • To understand material properties influencing Gilbert damping constants.

Main Methods:

  • Comparative analysis of magnetic damping constants and magnon diffusion lengths.
  • Discussion of material properties controlling Gilbert damping in CoFe alloys and MAFO.
  • Assessment of CMOS compatibility and fabrication requirements.

Main Results:

  • YIG exhibits the lowest damping but faces CMOS integration and nanoscale application challenges.
  • CoFe alloys and MAFO show comparable damping constants, though higher than YIG.
  • CoFe films offer CMOS compatibility and a 20x longer magnon diffusion length than MAFO.

Conclusions:

  • CoFe alloy thin films are a promising candidate for magnonics due to their CMOS compatibility and favorable magnon properties.
  • Further research into CoFe alloys brings the realization of spin wave-based magnonics closer.
  • Material properties controlling damping in CoFe and MAFO are key for device development.