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

2.9K
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...
2.9K
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

1.4K
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Dark and Light Triad personality profiles and differential projected effects of simulated node manipulations in depression-anxiety symptom networks.

Psychology and psychotherapy·2026
Same author

Melanoma cell-derived LAG-3 enhances CXCL1/8-driven MDSCs recruitment and immune escape via TRIM28-mediated IκBα degradation.

Journal of advanced research·2026
Same author

Surface-Spin-Induced Magnetic Loss Enhancement in Ultralight Electromagnetic Absorbers.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Supercharged ferritin nanocages enable universal cytosolic protein delivery.

Nature communications·2026
Same author

Design, synthesis, and biological evaluation of BODIPY-based photoactivatable Crizotinib prodrugs for precision cancer therapy.

Bioorganic & medicinal chemistry letters·2026
Same author

The Understanding of Size-Dependent Magnetic Loss Mechanisms Based on Surface Atoms Moment to Tune Electromagnetic Wave Response.

Small (Weinheim an der Bergstrasse, Germany)·2026

Related Experiment Video

Updated: Jan 12, 2026

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.0K

Intergranular Phase Engineering in Nd-Fe-B Magnets: Achieving Deep Dy Diffusion through Cu-Modified Grain Boundaries.

Haihui Wu1, Zhanjia Wang1, Mengying Bian1

  • 1State Key Laboratory of Materials Low-Carbon Recycling, Key Laboratory of Advanced Functional Materials, Ministry of Education of China, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.

ACS Applied Materials & Interfaces
|November 6, 2025
PubMed
Summary

Melt-added copper significantly enhances grain boundary diffusion in Nd-Fe-B magnets, increasing coercivity and diffusion depth. This method successfully improves thick magnets for applications like high-temperature wind turbines.

Keywords:
Nd–Fe–B sintered magnetscoercivitygrain boundary diffusionmicrostructure optimizationsquareness

More Related Videos

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

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

Published on: June 7, 2018

8.9K
Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
08:58

Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory

Published on: March 7, 2018

9.8K

Related Experiment Videos

Last Updated: Jan 12, 2026

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.0K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

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

Published on: June 7, 2018

8.9K
Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory
08:58

Processing of Bulk Nanocrystalline Metals at the US Army Research Laboratory

Published on: March 7, 2018

9.8K

Area of Science:

  • Materials Science
  • Magnetism
  • Nanotechnology

Background:

  • Grain boundary diffusion (GBD) enhances coercivity in Nd-Fe-B magnets.
  • Challenges exist in achieving sufficient diffusion depth for thick magnets.

Purpose of the Study:

  • Investigate the impact of different copper (Cu) addition methods on GBD processed Nd-Fe-B magnets.
  • Optimize microstructure and magnetic properties for enhanced performance.

Main Methods:

  • Explored three Cu incorporation strategies: surface diffused, grain boundary-doped, and melt-added.
  • Utilized DyH3 nanopowder as a diffusion source for enhanced GBD.
  • Analyzed microstructural changes and magnetic property improvements.

Main Results:

  • Melt-added Cu created a uniform grain boundary network, widening grain boundaries and improving magnetic isolation.
  • Optimized grain boundaries increased Dy diffusion depth from 401 to 593 μm.
  • Melt-added Cu magnets showed a coercivity increment of 11.76 kOe after Dy GBD, significantly higher than Cu-free magnets.

Conclusions:

  • Copper addition, particularly via the melt-added method, optimizes grain boundaries for enhanced GBD in Nd-Fe-B magnets.
  • This strategy successfully improves coercivity in thick (10 mm) magnets while maintaining squareness.
  • The findings enable GBD application in thick magnets for demanding applications like high-temperature wind turbines.